Both the X-Plus Gigantic Godzilla 1989 and DefoReal Hedorah standard version figures have been officially revealed, although not directly from X-Plus, from Hobby Search. Godzilla stands 52cm tall and retails (before discount) for 54,000 yen (approx $486 US). This figure can be pre-ordered now with release scheduled for Mar 2019. Hedorah stands 14cm tall and retails (before discount) for 6,480 yen (approx $58 US). It can be pre-ordered now with release scheduled for April 2019. These are both standards it is unclear what the Ric versions may be, we will updated to post with that info once available.
Update: The Ric version of Godzilla features a second closed mouth, and glow in the dark fins (pics added below). The Ric Hedorah adds a damaged eye option (pics below).

Aoshima is releasing the ACKS Series Godzilla x Mothra x Mechagodzilla Tokyo S.O.S. MFS-3 3 Type Kiryu (Machine Dragon) Model Kit. This is the second version of Kiryu (the first being the 2002 version), it is a colored snap together kit that is articulated once assembled. It stands 24cm tall and features weapons that can be removed, hard and soft parts to give it realistic detail, damaged and undamaged eye, and more. It retails for 9,800 yen and can be pre-ordered from the Aoshima website with release scheduled for April 2019.

Marusan has announced their April releases and they include some pretty cool items, Hedorah A Type with tadpole version, and Hedorah B Type both are done in a black glitter, Mechagodzilla green ice version, and Godzilla 1962 B/O style green glitter. Also being released are a Gappa family set, Gubila, and Kanegon. Both Hedorah's are approx 23cm tall and retail for 10,800 yen, Mechagodzilla and Godzilla are 30cm tall, Mecha is 17,280 yen, Godzilla 21,600 yen. The Gappa family is the same figures released previously in a new color and will retail for 21,600 yen, Kanegon glows in the dark, stands 30cm, and retails for 17,280, and Gubila is 23cm tall and retails for 7,560 yen. All will released in April 2019. 

T's Facto (Takashi Yamawaki) is releasing the Godzilla Final Wars Yasushi Nirasawa Concept Design Model Kit, a kit based on Yasushi Nirasawa's design for Godzilla in Final Wars, a design that is pretty awesome but was not use in the final film. It is a more aggressive design featuring large jagged fins, an unusual chest design, and a ton of detail, a cross between the millennium Godzilla and GMK Godzilla. This resin kit once finished stands 34cm tall and 61cm in length, is 51 parts, and will retail for 39,000 yen. It can be pre-ordered from the T's Facto site with release scheduled for Jan 2019.

NECA has official announced the 1956 Movie Poster Godzilla figure (yes 1956 because it is based on the US release of the film). The figure is meant to look like the actual poster including both the foreground and background. The figure will retail for approx $33, and will be released 2nd quarter 2019. Check out the info from NECA below along with official pics.

"NECA goes back to the movie that started the reign of the most famous kaiju in the world!
This version of the beloved monster is based on the one-sheet poster for movie’s 1956 U.S. release, Godzilla, King of the Monsters!
The figure measures 6″ tall and 12″ long from head to tail. It features over 30 points of articulation, including an articulated tail! The package insert doubles as a foldable backdrop that brings the one-sheet to life – Godzilla can be posed in the fold of the backdrop creating a 3D version of the poster illustration in toy form.
Comes in collector-friendly window box packaging with opening flap."

Marusan has three Super Festival 79 exclusive Hedorah figures, a light blue glow in the dark, gold glitter, and silver glitter versions. All three figures are 30cm tall (approx 12 inches), and each retail for 20,000 yen (approx $176 US). Also exclusives from Ultraman are Garamon green glitter and Ultraman Ace glow in the dark, both are 30cm tall. Garamon is 20,000 yen and Ultraman is 10,800 yen (approx $95 US).

X-Plus was at Super Festival 79 and gave us not one, not two, but three King Ghidorah figure reveals. We seen the first one before first unpainted than painted, King Ghidorah 1964 which will be released March 2019 so it should be available for pre-order soon. The second is the same figure but with the original color scheme red white, and blue (Rainbow Ghidorah) before Toho decided to go with the all gold look. This one should also hit soon with a March release date. The third one is a teaser reveal, Mecha King Ghidorah, it wasn't fully revealed but a dark photo that gives the basic design but no specific detail, and no release info yet. Also revealed was some Ultraman figures including a new Ultraman Tiga, that is coming April.

X-Plus has shown the DefoReal Godzilla 1998 a couple of times at different shows now we have official pics and info. This figure stands 13cm tall and the Ric comes with a separate hatching baby Godzilla (including a fish on it's base), this figure will retail for 7,992 yen (approx $71 US). It can be pre-ordered now from X-Plus (Ric) and other retailers (standard) with release scheduled for March 2019. A side note the X-Plus post refers to this figure as "Emegoji", so we now have a somewhat of an official designation, maybe.

Tanaka Studio is releasing the Godzilla 2000 Resin Kit, this kit is unassembled and unpainted but can be ordered for an extra fee assembled and painted. This kit is 27cm tall (assembled) and will retailed for 32,400 yen (tax included). For the assembly and all it will be an extra 80,000 yen (kit not included in that price). It can be pre-ordered now from Tanaka Studio with shipment in one to two months.