Superman returns to discover his 5-year absence has allowed Lex Luthor to walk free, and that those he was closest to felt abandoned and have moved on. Luthor plots his ultimate revenge that could see millions killed and change the face of the planet forever, as well as ridding himself of the Man of Steel.
This movie contains 7 potentially triggering events.
Very unpleasant scene of one Pekingese gnawing the bones of another (they’d been the pets of an elderly lady and left abandoned inside her home after her death. At the end of the film it’s heavily implied that Lex Luthor is going to kill & eat the remaining dog. Supposed to be funny, but not
25:27 - In a way, yes. There's a scene in which it's heavily implied a dog eats another dog out of survival. The eating is seen, and there's blood, bone, and fur; no meat. The fight/death is neither seen nor heard. Kitty makes a comment asking "weren't there two of those?" while looking at the dog.