Also the crap hack "Sonic on SNES" game that was based on Speedy. (That was way more interesting back before Sega started releasing 4 games a year featuring Sonic on Nintendo hardware).
Is this "ground up rethink" going to require major changes to your S-CPU? I want to know when it's safe to port, because I was gonna do it this weekend. That obviously would be dumb if it's gonna be in serious flux though.