Well it says "Full movie coming November 2008" at the end so that's a clue.
The issue is that it's stupid.
It's not going to be good (don't be fooled by the flashy CG, Sonic cutscenes aren't good, and this is just going to be a super-long cutscene) and yet they'll have spent money, time, and manpower on it. Plus, as I said, it's completely centered around a stupid gimmick that nobody wanted in the first place, never mind wanted to see MORE of outside the one game it was meant to be restricted to. If they're going to make a Sonic the Hedgehog short film I want it to be about fucking Sonic, not generic-furfag-fanfiction-quality-Scooby-fucking-Doo-ripoff bullshit.
Now, I will maintain that I think the werehog thing isn't necessarily terrible WITHIN the confines of Sonic Unleashed: the guns in Shadow were actually the least of that games problems, and I think the same of the werehog. But imagine if they'd made a film focusing purely on Shadow using guns and riding motorbikes. Featuring Omochao.
That's what this is.