Well at least Sega is rewarding Wii gamers for making Sonic and the Secret Rings a hit. Of course from the sound of things, the people at Sonic Team who made Sonic 2006 are making Unleashed, while the people at Sonic Team who make Secret Rings are making this. So if this game plays like Secret Rings and they fix the mistakes that game had, then this could end up very good.
This only problem is this is Sonic Team we're talking about here. They've had 10 years now to make a great 3d Sonic and they've blown it EVERY SINGLE TIME. Instead of fixing the mistakes in Sonic Adventure 1 by getting rid all the crappy non-Sonic parts like Shooting and Treasure Hunting, they added MORE of it in Sonic Adventure 2. And then when they finally got rid of it in Sonic Heroes, they end up messing up the actual Sonic gameplay which was the only good things in Adventure 1 and 2. And instead of fixing Heroes mistakes they end up making them even worse with Shadow the Hedghog. And just when you think it can't get any worse, we get Sonic 2006.
Secret Rings finally improved things, but the game itself was rather mediocre. A lot of Secret Rings mistakes can be fixable and so a sequel could turn out quite well. But like I just showed, Sega has had a history for quite a while now of failing to improve what could easily be improved in 3D Sonic games, and instead messing up what was actually good.
Like how they seemed to have something going for them in Sonic Unleashed with the daytime Sonic levels, only to have ruined it with the horrible nighttime Werehog sections that look just as bad as the Treasure Hunting and Shooting in Adventure 1 and 2 were.