Sonic could easily carry his own RPG: as long as the storyline doesn't take itself to seriously (I'm looking at you, Shadow and Sonic 06). Sonic, Tails, Knuckles, and Blaze are all well liked among the fanbase at the moment, and Shadow and Rouge where pretty popular before Sonic Heroes and Shadow the Hedgehog pooped all over them. Heck, Shadow still somehow maintained his popularity with the younger members of the fanbase afterwards. And many of the other characters, especially the Chaotix, have potential.
With a good writer and good development, the sky is the limit for the Sonic RPG. And BioWare well...they are the best of the best. Can't get much better then that. I just hope they can inject the kind of humor the storyline will need. Sonic shouldn't be in uber serious, Mass Effect-esque storylines. It needs to have a substantial amount of humor and ridiculousness, like Mario's RPG escapades.
Normally, I'd have my fingers crossed. But this is BioWare. We'll know they'll do us good. Edit: Mario And Sonic is fun for what it was: a sequel to Wii Sports. The game wasn't quite as accessible, but once you get it, it's hours of fun.
I'd also like to add that M&S is a very fun game...for being a Wii Sports sequel. People who didnt like WS wouldn't like it, but the people who did will.
