Cher and Meryl Streep Steal the Show at 'Mamma Mia' Premiere

Keegan Michael-Key steals the show as Black Panther, trying out some new sick burns on the Dark Knight.

Conan O'Brien took his show to San Diego Comic-Con and brought with him a Batman who's just looking for something a little brighter, like the Marvel Cinematic Universe.

The late-night comedian presented a star-studded comedy skit set in a high school lunchroom with himself as Batman, lamenting how dark and depressing it can be at the DC table. Everyone is just so lame, and Cyborg keeps malfunctioning. All he wants is to have a little joy in his life, and nobody is having as much fun as the "cool kids" at the Marvel table.

Unfortunately for Batman, the kids at the Marvel table have the best jokes and the sickest burns. "Sorry, this table is Marvel only," Iron Man (Rob Huebel) tells him.

"Yeah, DC ya later, you nerd," Thor (David Koechner) laughed.

Batman tried to argue that there was no difference between the two, but Black Panther (Keegan-Michael Key) could think of one. "Have you checked the box office lately, Bruce Lame?" he asked.

"Who knew people liked superheroes having fun instead of superheroes being sad and tortured and always soaked in the rain."

There were plenty of fun and geeky burns flying back and forth, but none so fierce as when Andy Richter showed up as Robin and had epic put-downs for every single member of the Avengers team. But even he wasn't the biggest surprise, as another character crossed over from yet another comic book universe.

Check out all the crossover excitement in the video above to see who else can lift Thor's hammer (hint: it's not Batman).