I'm curious how the franchise would've gone had Lucas not sold. I remember there were plans to 3D the entire series, the old EU to continue with Sword of the Jedi etc. and Clone Wars, and of course the 1313 game.
I think both TPM 3D and Red Tails not doing so great kind of was the last straw. This was also pretty much the heyday of RedLettermedia and prequel backlash was pretty much at an all-time high even years later (and despite Clone Wars being OK).