If I had my wish, then in addition to the great stuff we already have, they'd finally put out:

Superman: The Movie restored TV cut in widescreen

Superman II Donner Cut with an actual effects budget (the Phantom Zone...oy) and no lame high-pitched dubs for Superman

Superman II restored TV cut in widescreen

Superman III with fully restored widescreen deleted scenes (don't think I need them reinserted, but it would be nice to have them in a better format than some old TV print--and I believe there was still a scene or two missing from the DVD, like the room service guy at the hotel confusing Clark)

Superman IV restored director's cut

You could literally make a box set of restored extended cuts in addition to the tin (which is great, by the way--don't mean to sound like a whiny snot). Just my $0.02.

At any rate, keep up the good work, guys!