I would like to see Nintendo incorporate Mii's into Brawl.
Wouldn't it be great battling it out with ur friends while using a character u created urself? They could have their own fighting style and even attributes which would be upgradable. They would also make a great addition to Metroid Prime 3. Unlockable players in multiplayer perhaps? I think both these games would both be a lot more enjoyable to play and would also appeal to many more people out there not sure about Brawl or Prime. It would also most likely boost sales for these games. So tell me what u think and what games they should appear in.