IDW Kaiju List

Here is a list of all the Toho kaiju IDW has the rights to use. There may be more than what we have here.

(From left to right - Godzilla, Anguirus, Battra, Destoroyah, Gigan, Hedorah, King Ghidorah, Kumonga, Mechagodzilla, Mothra, Rodan, Spacegodzilla, Titanosaurus, Jet Jaguar, Sanda, Gaira, Moguera, Megalon, Ebirah, Megaguirus, Biollante, Monster X, Keizer Ghidorah, Varan, Gorosaurus, Zilla, Manda, Gezora, Baragon, Orga, King Caesar, Mecha-King Ghidorah, Kamoebas, Kamacuras, Ganimes, and Minilla)

All of them have appeared in or on covers of comics at least once,with the exception of Mecha-King Ghidorah, who is confirmed, and Ganimes and Minilla, who have both been strongly hinted at (Ganimes as a cave painting, Minilla appearing on an early version of a cover). Also note that IDW could also use any form of each kaiju (ex: Hedorah's flying and water forms) and all the incarnations of each kaiju (ex: Showa and Heisei Mechagodzilla as well as Kiryu).

36 kaiju total, but again, there may be more.