From Bandai, Plex Co., Ltd. & X Plus Co., Ltd.! Originally produced in Japan by X-Plus in 2012 (where it quickly sold-out), this version of the King Kaiju comes from the hit 1989 film, Godzilla vs. Biollante. Standing 12" tall, with an overall length of 18 1/2" from nose to tail, this version of Godzilla is masterfully sculpted and hand-painted, with no detail overlooked!
In stores 12/31/14
Retail $160

From Bandai, Plex Co., Ltd. & X Plus Co., Ltd.! A gigantic dinosaur resembling a Tyrannosaurus Rex, Gorosaurus was first seen in the 1967 feature film, King Kong Escapes (as well as 1968's kaiju epic, Destroy All Monsters) where the bipedal monster battled the mighty Kong on their Mondo Island home. Standing 10" tall, and with an overall length of over 15" to the tip of his tail, this beautifully sculpted, hand-painted vinyl figure captures every detail of this supporting kaiju in all his glory.
In stores 12/31/14
Retail $160

From Marmit. This reproduction of Marmit's Vinyl Paradise Godzilla: Millennium figure from 2007, is molded in a dark green vinyl, with black, red and gold spray detailing. The height is approximately 9" from his feet to his highest spine that rises over his head. 
In stores 4/29/15
Retail $65

Also listed is the S.H. MonsterArts Mecha King Ghidorah (5/15, $200), two more Sofubi figures, Godzilla Bullmark J-Tail (2/15, $75) and Godzilla '89 (4/15, $65), and Godzilla Bearbricks in two different sizes 1000% (27.5" approx $500+) and 400% (11" approx $100+) both due in March 2015.

X-Plus updated there site with both King Ghidorah and Godzilla '64, first Ghidorah. We knew this figure would be big but per the site the figure stands 37.5cm tall and 78cm wide and it not only the size that is big but the price too at approx $360 US it includes a burning flying saucer (15cm in size). It should be available December.  Update: The correct size of the figure per the Ric-boy site is 32cm to the head, 47cm to the wing tip height, and 62cm wing to wing width. Also the Ric-boy version will have two flying saucers one regular, one burning, and the size is smaller 9.5cm.

Godzilla '64 is a Real Master Series figure (resin) he will be 31cm and will run approx $285 US.

While there is some confusion on the X-Plus site it appears this release is the '61 version of Mothra not the '64 that there main page (and above pic) list. There seems to be an issue with the '64 from the way the listing reads, which appeared to be part of a set of Godzilla and Mothra. This figure has a 62cm wingspan, looks like there will have a Ric Boy version (light up eyes?), it will be about $180 US and will be available late November.

Both will be release in October and priced about $300 US the '89 is Ric Boy emissions version with light up fins, '62 is the Real Master series.

X-Plus will be releasing a 30cm Godzilla sculpted by Yuji Sakai, this may be a special edition or limited figure because it will run close to $300 US regular X-Plus figure run upwards of $200 normally. More info as we get it.

King Ghidorah is getting a lot of love these days with a S.H. MonsterArts figure (mecha version), Bandai US Vinyl, and the Godzilla sequel announcement now X-Plus will be releasing a 25cm version later this year, just in time for his 50th anniversary. There official Twitter page posted the pics and the post below. As seen in the pics he is quite large, more info as we get it.

 [Wonder Festival! ] つつつつ finally! The flashy! Toho Monster series King ghidorah 1968! Will be released later this year! 

While there hasn't been official announcement the two remaining X-Plus figures shown in Diamond's Previews showing up at SDCC pretty much seals the deal.

Diamond has announced their wave 6 reissues, Godzilla and Anguirus '55 both are monochrome to match there appearance in Godzilla Raids Again. Prices aren't known yet but should be around $150 -$200 range. This leaves only a couple of more figures left that have been pictured in Diamond's Previews, Godzilla '89 and Gorosaurus, an announcement is planned for SDCC for wave 7.