Hey I thought of something like that too but you could of done a Man-at-Arms/Batman brawl or Zodak vs. Green Lantern or Skeletor vs. Lex Luthor or Catwoman vs. Evil-Lyn or Gorilla Grodd vs. Beast Man or Trap Jaw vs. Deathstroke etc. etc
I'm actually the commissioner of this picture, and it was my intention for a flipside picture to a fan art I saw of Superman & Wonder Woman being beaten down by He-Man & Superman. So it's two halves of the same coin, really.