I want Sega to make Sonic Classic Adventure. Have it star Classic Sonic rather than Modern Sonic, focus less on speed and more on platforming, and have just three playable characters - Sonic, Tails, and Knuckles. Make it a 3D equivalent of the classic 2D Sonic titles.
I don't mind if they incorporate a few "speed levels" emulating the more modern play style, to mix things up a bit... just make sure that it's not the main gameplay.
(EDIT: Oops, I'd said "I want Nintendo to make..." at first)







