I would murder all of the cutesy little friends of Sonic that the bastard Sonic Team has created over years of work.
Okay... keep Tails, and maybe Knuckles for one stage. I'd want a game with a stripped-down storyline that doesn't involve princesses or genies or six categories of magical crystals. Just a lot of fast fast motion, cool boss fights, and fun stage secrets.
Soo... maybe a WiiWare release? Nah, just kidding, that's just for family party-game shovelware.