Based on what they've been saying about the game, they're going to focus on doing something new more so than a large character select screen. I loved all the characters that were in Brawl, but I do feel like topping that number would be kind of ridiculous. Having said that, I want to know why Oni Link keeps getting snubbed. I thought for sure, when they introduced the final smash, that Link's super powered alternate ego would have been a sure thing, but instead he got some lame triforce smash that always missed. Come on, Nintendo, bring back the fierce deity.
Also, I think it would be great to see a true dark Samus character, not just a color change. She/it would have its own unique move set reminiscent of the Metroid prime series. But I can't see this one happening because Nintendo kind of snubbed the American made versions of Metroid when they decided to use the Super Metroid model of Samus in brawl.