Parts of my mind is continually flip flopping between various stages of science fantasy. I'm thinking about steam punk, super heroes, bits of space opera...the list just goes on and on and on. I'm thinking about various ways of redoing SpellJammer for Pathfinder. Well, maybe not a complete redux of SJ but taking the idea of that setting and mixing in a lot of things judiciously. Among other things, mix the following:

Aerial Adventures from Goodman Games
All the dinosaurs of Broncosaurus Rex from Goodman Games
Airships from Bastion Press
Eberron from Wizards of the Coast (3.5 Ed version)
Iron Kingdoms from Privateer Press
Iron/Jade Claw from Sanguine productions
Pathfinder RPG from Paizo Publishing
Book of Secrets from Cubicle 7 and Adamant Entertainment
Bit and pieces from everything put out by 4 Winds Publishing
Environmental books from Wizards of the Coast, Bastion Press, Goodman Games (Wanderer's Guild) and Necromancer Games
Kobold Quarterly

What do you get?

Part of me is thinking of doing this as a kind Steam Punk Moebius. Sonic is dead or has been roboticized and so has much of the other freedom fighters. Or they are competition for the the PCs. Either way I'm keeping Robotnik as a kind of necromantic alchemist with legions of robotic zombies at his command. The good doctor himself is an Iron Lich and was the LAST human before he committed suicide as part of attaining his current form.

Or I could just be insane.