User blog comment:DerpZilla/Sequel to Godzilla (2014) Confirmed!/@comment-24460806-20140520180407/@comment-22580353-20140521005833

The Gryphon and the Probe Bats are Tri Star monsters saddly.

They can only return if Tri Star decides to work on the movie with Legendary (maybe they are who knows)

Even if they do though the Probe Bats and Gryphon probably won't return.

But Bagan would be cool.