There's been some mention of it, but a lot of people are skeptical. Considering it was just announced and is rumored to be coming out this year. Such a small development cycle sends up a red flag for some people.
Other than that, let's see... Isn't Team Sonic USA working on it? And aren't they god awful? (If I remember right..) That, and the people who want this most, the fans of the first game, are being rather silent about it... since they potentially see a game they've clamored for for years getting set up to flop.
Now, it's still got potental, mind you, it's just hard to not be a little leary of what Sega might actually end up doing with it.