Bandai's Movie Monster Series and Monster King Series figures for Godzilla: King Of The Monsters have been fully reveal. The Movie Monster line features Godzilla, Rodan, Mothra, and King Ghidorah, while the Monster King has Godzilla. Prices for the Movie Monster line starts at approx. $14 USfor Mothra, going up to King Ghidorah at approx. $24 US, the Monster King is approx. $45 US. The Movie monster figures are 6 inch scale, the Monster King 12 inches. They are all scheduled to be released April 2019.

NECA has officially solicited two more figures for Godzilla: King Of The Monsters, Godzilla 12" Head To Tail Version 2 and Rodan 7". The two figures are  scheduled to be released 3rd quarter 2019 and retail price of approx $27.99, there was no word if we will get a Ghidorah figure yet. Check out the details below.

Godzilla 2019 Version 2 – 12″ Head-to-Tail Action Figure
NECA is thrilled to present another figure from the upcoming, hotly anticipated Godzilla: King of the Monsters movie!
Based on the monster’s on-screen appearance in this sequel to the 2014 Godzilla movie, this version of Godzilla features lightning paint deco and is fully poseable, with over 25 points of articulation. 
The figures comes with an attachable blast effect.

Rodan 2019 – 7” Scale Action Figure
NECA is thrilled to present its next figure from the upcoming, hotly anticipated Godzilla: King of the Monsters movie!
Based on the monster’s on-screen appearance in this sequel to the 2014 Godzilla movie, Rodan features articulated wings and includes a display base with support rod for simulated in-air poses. 

NECA has officially solicited two of the monsters for Godzilla: King Of The Monsters, Godzilla 12" Head To Tail and Mothra 7". No images were shown yet but descriptions were. Godzilla scheduled release date is March 2019, Mothra April 2019, and retail price of approx $27.99, there was no word on the other two monsters yet. Check out the descriptions below, we will update with images once available.

Godzilla – 12″ Head-to-Tail Action Figure – Godzilla (2019)
NECA is thrilled to present its first figure from the upcoming, hotly anticipated Godzilla: King of the Monsters movie!
Based on the monster’s on-screen appearance in this sequel to the 2014 Godzilla movie, the all-new Godzilla is fully poseable, with over 25 points of articulation. 

Godzilla – 7” Scale Action Figure – Mothra (2019)
NECA is thrilled to present its second figure from the upcoming, hotly anticipated Godzilla: King of the Monsters movie!
Based on the monster’s on-screen appearance in this sequel to the 2014 Godzilla movie, Mothra features articulated wings and includes a display base with support rod for simulated in-air poses. Includes Mothra Larva.

​Rodan will also have a display base as seen at Toy Fair 2019 and there will be a second Godzilla (emissions version)(below). There may also be a 12 inch tall Godzilla and Ghidorah as well.

Chara-Ani is releasing two new Toho Kaiju Netsuke figures, Godzilla 2019, and Mothra from Godzilla: King Of The Monsters. These deformed style figures are approx 2 1/2 inches tall and come with a collectible wooden storage box and name plate (w/ring to attach to a key chain). They retail for 10,800 yen (approx $95 US), they can be pre-ordered now from Chara-Ani, and other retailers. They are scheduled for release in May 2019.

Rubie's Costumes will be releasing Godzilla: King Of The Monsters merchandise, mainly costumes but other items as well. There are jumpsuit style costumes of Godzilla (child and adult) and King Ghidorah, masks of various styles of all four monsters, a Godzilla pet costume, an inflatable costume. Also shown are Godzilla and Ghidorah wall breakers. No word on release timing or price, scans are via Gormaru Island.

Jakks Pacific Godzilla: King Of The Monsters figures have been revealed, at least some. A large 20 inch long Godzilla, as well as two 6 inch figures, Rodan and King Ghidorah each including a few accessories. Also revealed were two battle sets Godzilla and Ghidorah, Godzilla (emissions version) and Rodan, and Godzilla and Mothra (spoilers) all include scenery in the package. A giant size version of Godzilla will be available as well standing over 40 inches tall (note this maybe the same as the 2014 version based on the pics). Jakks will also have a Godzilla mask with sound (bottom). All should be available April 2019. It is unclear if there will be a smaller 6 inch Godzilla or Mothra will also be available from Jakks (possibly second assortment). Original source Animegami website. 
Update: the Godzilla and Mothra set is considered a spoiler (files below are pics).
Update 2: Jakks has released US prices and info for these items and announced they will be Walmart exclusives, prices and updated info added to listings below. They will be unveiled at Toy Fair tomorrow.

Listings:
Godzilla 12″ Tall Figure
12-inch Godzilla Figure: This amazing Godzilla stands at 12 inches tall and over 20 inches long. He is fully poseable at the neck, shoulders, legs and tail. This figure is recommended for ages 3 and older.
Price: $19.99

Godzilla Giant Size 24″ Tall Figure
24-inch Godzilla Figure: This Godzilla figure is the ultimate gift for Godzilla fans. Standing at 24 inches tall and over 36 inches long, this figure is fully poseable, with articulation in the jaw, neck, shoulders, hands, legs, feet and tail. Its massive scale and incredible detail will bring Godzilla to life for fans ages 3 and older.
Price: $59.99

Monster Matchups 3.5″ Tall 2-Packs
3.5-inch Monster Battlepacks: Kids can recreate the film’s epic battles and action with a unique Godzilla figure, an articulated legendary monster figure and a backdrop accessory. Each two-figure Battlepack is recommended for ages 3 and older.
Price: $9.99
Content (case pack):
– 3x Godzilla & Rodan
– 2x Fire Godzilla & Mothra 
– 3x King Ghidorah & Godzilla

Monster Packs 6″ Figures
6-inch Monster Figure: Kids can collect their favorite legendary monsters—King Ghidorah and Rodan—in 6-inch scale. Each articulated figures comes with a vehicle accessory and a breakable building. King Ghidorah and Rodan are sold separately and are recommended for ages 3 and older.
Price: $14.99
Content (case pack):
– 2x Rodan
– 2x King Ghidorah

Godzilla Electronic Role Play Mask
Godzilla Electronic Mask: Kids can imagine they are the King of the Monsters with the Godzilla Electronic Mask. Simply open Godzilla’s mouth slightly to activate Godzilla’s growl, then open a little wider to activate Godzilla’s lights and unleash his thunderous roar. The Godzilla Electronic Mask will be available for fans ages 3 and older.
Price: $24.99

Tamashii/Bandai has officially updated their site with pics and info for both Godzilla 2019 and King Ghidorah from Godzilla: King Of The Monsters. Godzilla is 16cm tall and comes with a ray effect and effect joint (possibly for pose shooting it straight up). it will retail for 7,200 yen (approx $65 US). Ghidorah stands 25cm tall and has a 60cm wingspan, it comes with a stage set (struts to hold wings), and it will retail for 18,360 yen (approx $166 US). Godzilla is scheduled for release May 2019, Ghidorah June 2019, both can be pre-ordered now, there is no word yet on Rodan or Mothra but they should be available to pre-order soon.

Bandai revealed their S.H. MonsterArts Godzilla: King Of The Monsters figures at Tokyo Comic Con. This was a bit of a surprise to us cause we got no other full reveals at the stage presentation with Michael Dougherty, just another teaser trailer and production stills. The four figures give us a good look at the monsters for the first time. Godzilla is updated over the 2014 version, slightly different back fins and feet among other minor changes. Ghidorah looks very similar to past incarnations, a little thinner, more lean with many minor differences. Rodan, which we got the best view of in the first trailer, looks as expected, although it was hard to truly make out most details because of his darker coloring. Mothra is the one they changed the most, while it's wings have a familiar look and coloring, the body is much more insect like with long legs that remind us of Muto legs. Some details are hard to make out because these are articulated figures, with joints affecting the look. No release dates were announced yet but these should be released next year (there is a date of 1/19/2019 on the Tamashii King Of The Monsters page, pre-order date?). More info as we get it.

Warner Bros. Consumer Products featured both Godzilla: KOTM and Rampage at the Lisensing Expo 2017, they were featured as part of their portfolio though no actual products or marketing were shown yet (it may be simply to far out). Below is the press release info on the two films, more as we get it.
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Following the global success of 2014’s Godzilla and the acclaimed return of King Kong in Kong: Skull Island earlier this year, Warner Bros. Pictures and Legendary Pictures deliver the next unmissable chapter of their MonsterVerse with the highly-anticipated Godzilla 2.
Directed by Michael Dougherty (Krampus), starring Vera Farmiga (The Conjuring), Kyle Chandler (Friday Night Lights) and Millie Bobby Brown (Stranger Things), this epic cinematic event unites the larger-than-life icon and global fan-favorite with some of the most renowned giant beasts in popular culture. When the King of the Monsters comes stomping back to screens in March 2019, WBCP, together with Warner Bros. Pictures and Legendary, will continue the action and adventure through its exciting product offerings for fans.
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Global megastar Dwayne Johnson headlines New Line Cinema’s action adventure Rampage, as a primatologist who shares an unshakable bond with an extraordinary silverback gorilla who has been in his care since birth.  But when a rogue genetic experiment gone awry transforms this gentle ape into a raging monster, it’s soon discovered there are other similarly altered alpha predators. As these newly created monsters tear across North America, destroying everything in their path, he fights his way through an ever-changing battlefield to halt a global catastrophe and save the fearsome creature that was once his friend.  Rampage charges into theaters April 20, 2018, and WBCP will bring these creatures to fans through collectibles, action figures, apparel and more.