Only a recommendation, but I think Deathsaurus (Deathsaurus (Victory) - Transformers Wiki, Deathsaurus - Wikipedia, the free encyclopedia) would make a great antagonist for TRANSFORMERS 4: - he can turn into a Dragonzord. Since we can't have official Dinobots in these films (no robots taking on Earth beast forms), we could try an indirect approach and cast robots like Sky-Lynx and Deathsaurus (robots with animal non-Earth forms, like Hatchet). It'd be fun to see an "Autobots vs Godzilla"-styled fight. - he has a hovering planet-destroying fortress. That reads "Transformer Death Star", and would make for an awesome visual sight as well as a source of new Decepticons and a great battle site. - he's an interesting character: a Decepticon warlord whose ultimate goal is to take revenge and finish off his greatest rival, but also a caring wife and father as well as commander of an army. I think such a character might work well for a Bayformer. Would you like to see a TFilm Deathsaurus?