My only worry is how they'll do with the night time parts. They kind of have to realize that the people playing this game are going to play it more at night thanks to their daily lives (for instance, school, work, and extracurricular activities). What 'time' is considered 'night' in the game? 7pm? 9pm? If you think about it like that, unless you switch your Wii's clock to the opposite time (literally am to pm), you may end up playing the game more like the werehog they put in there rather than a blue blur (even if you do change the time, what time is considered day?).
I'm more wary of the werehog more than anything. It actually seems to be like a genuine Sonic experience from what I've seen, the kind of Sonic that everyone loved way back when. It's that giant monster that's killing it, and I can't help but feel sorry for Sonic, especially when stuff like that is constantly happening (and can they seriously stop adding in new characters every damn game?! Why should we care about this thing called Chip? It's not Tails or Knuckles, or hell even Amy or Cream or Shadow or Rogue! It's just another character they added in for the hell of it, and if it turns out Chip is a part of some monstrous demon thing, then that isn't exactly going to be the biggest plot twist in the history of games ><)