Yes.. Just last week I posted about how cool it would be if there was a simple board game mode where at the end of the turns, everyone participates in a smash event, like at the end of Smash Run.
BOOM BABY. IN.. ONE.
Next I'm predicting that you can actually deleted characters from the character select screen, and spend in game gold to turn them into characters people actually want.
GENIUS.
I'm psyched for Stage Builder. They really need to have 'themes' available.
Best case scenario... You have the ability to basically do what they did with Omega stages, except you can add platforms, blocks, other objects, but all within the theme of the stage.
Stages can be uploaded, rated, and downloaded online. Nintendo shares their favorite stages every month or something, a la Little Big Planet.
Worst case scenario, it's exactly like Brawl's mode.