Smash Bros. + FSA's Shadow Battle =
... Super Sprite Bros.?
Just a thought, but I was thinking about combining the concept of Smash Bros. (many different characters, levels, power-ups, attacks and items from a multitude of games) with the format of the Shadow Battle half of Four Swords Adventures (minus the GBA requirements, of course).
It's Online
Well, with any luck, Super Smash Bros. Brawl should be online, correct? Now... While I'm sure it'd be hard to do... Wouldn't it be frickin' awesome if you could download new characters, levels and missions from Nintendo?
That would kick ass.