I don’t know about “work well” but I’d like to see any Morrison-era Doom Patrol villain run into the rest of the superheroes just to see Superman or any of the League come back to the DP and say “Oh my god- what the hell is it you guys get up to all the time?” If something similar to this happened already I had no idea. Otherwise, I have no clue. I feel like everybody’s pretty well cross-pollinated villains at this point.