User blog comment:Radionatix/Will Gamera be on the Godzilla Cinematic Universe?/@comment-4600455-20160516153037

The last time such an idea was raised, Kadokawa only wanted it to happen if Gamera won. Toho refused to make the movie, presumably for that reason. I highly doubt Toho will have changed their minds and I doubt Legendary would want to do it either.