Well Dr. Mario was useless, it would have been nice to see him as an alt costumes though (I think with Smash 4 that'll happen). Mewtwo was the only of the five which didn't deserve to be cut off, but I think Sakurai will put him in again.
Think of this game as the first Smash Bros. An experiment that will pave way to future instalments. Expect a sequel on the next gen console.
and we'll be waiting
Not expecting it do well enough to get a sequel.
They're already talking about dlc characters when there's only 20 launch chacrters. Sorry but who ever buys this game day and with the dlc love to get ripped off.