Yeah, it s kind of strange that the best cop and the badest criminal in the universe team up, but my friend look at the enemies they have to fight. And i think it would be a great story to put all of this characters into one comic or movie or book.
If I had any extensive knowledge of Judge Dredd like I did Riddick or Terminator, or Predator, I would totally put that on my writing list. With your permission, of course. Right now I'm stuck in the middle of an "Aliens VS Marvel Universe" story I thought up.