Superman might be the first DCU movie, but it's surprisingly self-contained – and that includes the after credits stingers.
Both of the Superman post-credits scenes are small moments that don't set up the future or introduce any shocking cameos. The first scene is Supes and Krypto sitting on the moon overlooking Earth, and the second is a gag between Mister Terrific and Clark, in which Clark is mildly critical of Terrific putting a building back together a little lopsided.
