Rubeosaurus is the first ceratopsian dinosaur to be confirmed for Beasts of Bermuda. Triceratops is a likely candidate, but it is not yet fully planned. See here for a full list of confirmed, discussed, and likely creature additions to the game.
This dinosaur lived in the Cretaceous, and like other ceratopsians, it was an herbivore. It is considerably smaller than its cousin Triceratops, and more closely resembles Styracosaurus. Its in-game abilities are still being decided upon. It is very likely that this creature will not be playable for the public in quite some time, as it does not yet possess a model.