Writer/director James Gunn has a long history with Cooper, who, of course, was Rocket in the "Guardians of the Galaxy" series. So, it didn't take much arm-twisting when Gunn made a call to the Oscar-nominated multi-hyphenate.

There’s a new DC universe in town that’s being kick-started by James Gunn’s “Superman” this weekend. Headlined by David Corenswet as the Man of Steel, “Superman” is poised to relaunch the DC universe and usher in a more vibrant,

Yes, Superman has a post-credits scene. Two, in fact. One around the mid-credits and a second at the very end. The scenes featured don't exactly tease anything or set up future DC projects, and that's how writer/director/studio head James Gunn wants it.