Although, it probably won't be good. Sonic REALLY needs a reboot... Actually SEGA needs a reboot. Let's give SEGA a reboot.
Man I would love Sega to reboot some of their classic franchises. I'd kill for a new Wonder Boy or Alex Kid game. Alex Kid would have made for an amazing plat former. The problem being that I just don't trust them to do it nowadays.
I think that last part is the key. I would love to see the return of some franchises. But, ultimately, they are good where they are.
I also, to be honest, like how sega seemed to abandon franchises when switching systems (There's always a tiny bit that bleeds over though).
SMS - Alex Kidd, Wonder Boy
Genesis - Streets of Rage, Golden Axe, ToeJam and Earl (I would argue that Sonic lived primarily in the Genesis days. No real Sonic for Saturn, etc.)
Saturn - Panzer Dragoon, Clockwork Knight, Virtua Fighter/Cop
Dreamcast - Shenmue, Space Channel 5, Jet Set Radio, Crazy Taxi
This causes each system to have its own feel. Part of me likes that Streets of Rage never left Genesis. And part of me hopes it stays like this. It makes collecting for SEGA consoles a treat as each console is not merely the same games updated. Your favorite sega console almost always falls in line with your favorite franchises.
So, ultimately, I am anti-reboot but pro-franchise. Just create new franchises. If you need a reboot, then it is played out. Move on.