This sounds wonderful. The "evil Superman" scenes and the car junkyard fight are among the best moments in the entire quadrilogy (actually, they're my very favorite minutes in all four films) and Superman III is an unjustly maligned picture. Even with Pryor's awful "funny" sequences it's a good film (although the "general" scene in Smallville is so painfully horrible that it makes Nuclear Man I in Superman IV look like Marlon Brando's footage - I'm glad to see you're obliterating every trace of it... ), incomparably better than, for instance, "Superman Remakes" - and with such changes, it may become a great one...