Personally, I’ve alwyas been a huge advocate of Ridley and Star Wolf in Brawl. Like Bowser and K.Rool, Ridley’s size appears to fluctuate over the different games. In Super Metroid he’s about 1.5x Samus’ size, but in Prime 1 he’s 2-3x larger than her. However, Bowser’s a beefy guy, and they got him to fit in fairly well, so I have hope for Ridley.
Star Wolf, of course, is almost self-explanatory. Natural rival of Star Fox, a fairly brutal and badass personality (perfectly suited for a BRAWLING game after all) make him an ideal choice. I’ve heard fan-ideas for hmi using a combat knife of some sort, which, while not 100% canon, might fit well with his persona. Whether he’d be a clone or a character himself remains to be seen.
I’m very encouraged by the fact that they’re re-working all the characters to reduce the amount of clones. Here’s hoping Ganondorf gets to use his big meat-cleaver this time around. Why model, texture, render, and weight that sucker if you won’t put it in the game?
…Then again, you could also say that about Ridley. He DID make a cameo in the Melee opening cinematic, after all. Hmmmmm. Here’s hoping his Brawl incarnation isn’t as cartoony as that.