Well SEGA has already Hinted that it will most likely be a 3D Sonic.. as they were taking about how the using Depth can increase th sense of speed and alow visibility to cut down into running into enemies obstcales becaus your movimng to fast to react to them.

I want a Adeventure style sonic game i dont like to rush style( footrace sonics) as much as the adventure style.

I'm with Rol, Rush style for their first crack.

It's probably Sonic Anniversary Collection:

http://www.sonicstadium.org/2011/03/rumour-sonic-anniversary-coming-to-nintendo-3ds/

You know what I want? A Sega Collection game for the 3DS with online multiplayer for games like Street of Rage, Golden Axe etc, but it will never happen.

I don't think Sega would be able to repeat what they did with Sonic the Hedgehog if they use 2D graphics. There have been 6 Sonic games (incluiding the collection) on GBA and DS that were in the 2D platformer style, but no one cared about them. The best way to go is to go with the Sonic Colors Wii style, which the 3DS is now capable of doing, and with some more impressive type effects. Sonic Colors on the Wii had some very impressive and flashy graphics, animations, and effects.

2D Sonic.. They have only made 2 3D Sonic games worth anything, while I have enjoyed every 2D Soinc. If not then just do another Sonic and Sega All Stars Racing game its pretty enjoyable.

i would like either a new awesome 2d side scroller or a sonic collection to come out

also i loved sonic secret rings on the gamecube as well.  would also love a game similar to that.

If they're going for a 3D Sonic, then I'd say go for what they've done with Sonic Colors. Great mix of both 3D and 2D, with both a focus on speed and platforming (just less floaty jumps this time!).

If they're going for a straight 2D Sonic, then I'd say they should aim for where they're going with Sonic the Hedgehog 4. Sonic Rush/Rush Adventure were fine and all, but I think they put a little too much emphasis on speed on not on platforming. I actually preferred Dimps work on the Sonic Advance series for the GBA.

Either way, you really can't go wrong. Anyone who keeps saying Sonic is dead hasn't played Colors or Sonic 4.

Some of my favorite GBA games

Very Well Said. Sonic Advance is My favorite Sonic series since the original trilogy.

Sonic Is a mix of speed, platforming, and enemies modern sonics forget the last 2 often

Where's the option for '2D Platformer made by DIMPS (Sonic Advance/Rush series)'?