The Donner film is so definitive that I don't think an all-out origin movie should be done. I was just thinking in the other thread earlier how I'd rather see them go the opposite direction--Superman Ends. Give us an older Superman in a Kingdom Come
-type story (but centered more on Superman rather than featuring all those other characters, which would probably be undoable).
The more people hash around what the next Superman movie ought to be / where Returns
went wrong / etc., the more I hope that the proposed Shazam!
movie works out. The Big Red Cheese pushes so many of the same classic superhero buttons, without all the baggage and expectations.