All tease and no please, for now, but the fact it's 2D based is promising. I wonder if Sonic is even the main character : /, this teaser leads me to believe he might not be..I thinkt his might be spiny son!, of course I could be wrong...
Now confirmed as a Sonic game.
Happy Dreamcast Day 09/09/09
A new solo Sonic with no new enemies says Sega:
Project Needlemouse - First Artwork