The animation in that trailer is phenomenal. Considering how open-ended it is (it's B&W pencil sketches up until the end and then it turns into color) and a previously leaked animation test (with Sonic fighting a Hard-Boiled Heavy), I think we might be getting a series of animated shorts along with it. Which really, really, makes me happy.
Stardust Speedway Past being confirmed is also neat as well.
I have never pre-ordered a game before, but Mania is looking like the one true exception I'll have to make here.
I need a physical copy of this. This has the potential to outsell Forces. What's wrong with you SEGA??
The trailer interestingly enough, specifically cited that "
digital pre-order now available" at the end. So maybe there's a retail release coming, Aaron did say Sega was looking into the idea.