The one I watched was about Superman knowing he's about to die, so he prepares for his death. He meets people from Krypton. I don't know why they were alive, but they were. His fortress has robots in it and a pet sun-eater. Lex Luthor goes on about something that should probably go in a spoiler tag.
I didn't really like the film, the volume was too low and I wanted to go home.
I'm not sure of the name of this film, but it was an animated DC one. Superman looked like Lex Luthor with hair.
I give this film a 5/10, because I think I'd have enjoyed it if I was sober and the volume was turned up a bit.