Apparently model-maker (and FINAL WARS assistant director) Hiroshi Sagae posted this on Facebook earlier today:

“It is said that KADOKAWA CORPORATION will make a new GAMERA movie. A new image board will be published with the magazine of sale in May.

Next year is 50th anniversary of birth year of GAMERA.



http://item.rakuten.co.jp/amiami/med-book-002053/”

Remember to take this with a pinch of salt, but it would be great to see the Guardian of the Universe and the Friend of All Children return for his 50th Anniversary in any form!