The Richard Donner cut is much more tied in with the first film, which was shot at the same time. It also has more Gene Hackman because Hackman was angry with how the Salikands had treated Donner and refused to participate in the reshoots. That's also why he didn't participate in that vile film Superman III. More importantly however, all of the Brando footage has been restored, completing the Kryptonian prophecy as the son becomes the father and the father becomes the son.
Personally, I doubt Warner would commit to it, but I'ld like to see a film trilogy about the death and return of superman.