Board Thread:Speculation House/@comment-4403232-20140411230237/@comment-4830106-20140604002929

Or maybe RWBY will take the A:TLA route and have an overarching series antagonist backed up by different people. For example, the Fire Nation was the overarching antagonist, whereas the main bad guy changed (in terms of importance) throughout.

Season 1: Zhao/Zuko

Season 2: Azula

Season 3: Ozai himself

That, or they'll do what Korra did and have completely different antagonists each season, so that way the show would be focused more on world-building and the development of the characters.