I think if Ridley is going to be revealed (which chances are he will, although the boss thing still makes me kinda doubt it) he'll be revealed alongside a new Metroid game.GalacticPetey said:I feel a Smash direct is a very real possibility. I can almost 100% say there will be a direct of some sorts next month. Whether it focuses on one game is up in the air. Like you said, there could be more than one. I'm one of the many people wanting a "villain trailer". It would be the perfect way to confirm Wario, Meta Knight, and Ganondorf (maybe Wolf, assuming he's in the game). To top it all off, Ridley is also shown with them. Maybe even hint at a certain Kremling towards the end.
You mention a Hyrule Warriors direct. I know it would mostly focus on Hyrule Warriors, but I could see Iwata saying something like "Mr. Sakurai requested that we show something a little extra for you today." Smash logo appears, Link is fighting random enemies until all of a sudden Ganondorf emerges and challenges Link to duel. Cut to footage of Ganondorf with a new moveset ducking it out with Link. And then right after that, Ganondorf revealed for Hyrule Warriors.
Personally I don't think they'll create a trailer just for a veteran (bar Mewtwo), even if he is receiving a revamped moveset. If there's going to be a character revealed alongside a Hyrule Warriors direct it'd be a newcomer to Smash like Girahim or Agatha.