I, for one, think it would be fantastic! Then I would apply for a job there! I have tried to imagine what SRB2 would look like with modern technology, and it's amazing.
If this really happenned, just do what you did for SRB2. Not really structually, but similar gameplay, modding, ect. And a lot of secrets, too. I started on Sonic Adventure 2 Battle. It is still my favorite game. I bought Mega Collection, then a couple nextgen, and resold the nextgen. Not for profit. On the other hand, I loved the feel of the classic games. I think that STJr. running SEGA would bring back that classic feel in 3D, like SRB2 does now. With a different engine, professional programmers, and pay, this could be the best freakin' game on the planet.
Rating: 5/5 =D