First off, unless they're attaching rockets to an actual hedgehog and painting it blue; it's not really live action, is it? CGI is just a different shade of animation, lads. Soz.
Second, Sonic's got fur. It's been gelled up in to spikes, but is this classically hedgehog? I think it's more a cat-with-mohican vibe. So that's no good either.
Anyway, here's something they're calling a 'motion-poster'.
Other things we know: It's from the same producers as The Fast and the Furious (speed and that, makes sense), Dr Robotnik is either going to played or voiced by Jim Carrey (see previous 'live action' chat for the issues here) and it's due out next summer.
Be ace if it was actually alright.