I love this movie but I've always been frustrated by the timetravel trick, which makes no sense to me.
So I reedited the ending this way. Sad to lose Christopher's awesome scream, but at the same time, he doesn't get to tell JorEl to f*** off and choose his girlfriend over his Krytonian education (keeping that for Superman II).
I've also cut my own version of Superman II : here are extracts from my "Ultimate Cut" that show how I got rid of the turning back time again, the superkiss and managed to make Superman Returns canon.
Superman II Ultimate Cut Fix 1 The Introduction
   • Superman II Ultimate Cut   Fix 1  T...  
Superman II Ultimate Cut Fix 2 Memory Loss
   • Superman II Ultimate Cut  Fix 2  Me...  
Superman II Ultimate Cut Fix 3 The Aftermath
   • Superman II Ultimate Cut  Fix 3  Th...  
There are other changes of course but I can't upload the entire movie without getting in trouble with Warner Bros. Hope you enjoy !