I think I've finally settled on a name for this piece! "Marvel Monday" felt too tied to the YouTube series I do and didn't feel right since a couple of these characters haven't gotten episodes (yet). Calling it "Secret Wars" also felt off since it's just a bunch of Marvel characters and not really tied to either of the Secret Wars series. So "Contest of Champions" feels right!
Be sure to check out the episodes on my YouTube channel! youtube.com/c/WyattTheNerd