Elric would be a good one, as well as Fafhrd & Gray Mouser, Conan, or even Red Sonja. You would need to commit to a budget, though, and for the Elric I would insist that Moorcock himself be at least consulted and listened to, if not actually having creative control. That series has a unique voice and feel that would be supremely difficult for anyone else to capture.
Just the sheer decadence of the Melnibonean court would be fun to see, but yeah, it would take some work.