I would like to see a fan editor tackle Superman 2 and make some sort of hybrid, I really enjoyed the Donner cut but there was a few things when I was watching it, I missed from the Lester cut. and feel would look good in a hybrid of the two and maybe including some of the deleted scenes on the disc as well.
I would also like to see extended editions of Superman 3 & 4 I know they arent the greatest films, but it would be interesting to see them with the deleted scenes added.