I think the Joker tease/no new character announcement overshadowed the fact that they advertised a big 3.0 update for Smash. No other Smash game has gotten that kind of update before. Smash 4 just got tiny bugfixes and balance changes, but it sounds like we're gonna get whole new features. We could see the return of Home Run Contest, Break the Targets, and Event Matches. Or maybe entirely new modes and changes that we've never seen before. This is going to be the first Smash game to get huge content updates like this.
Of course, we're liable to get some changes to the online play. Sakurai even admitted that it didn't seem to be working the way he intended. But I'm more excited for how much more content and features this game is going to get.