I'm really getting into the TV Series Black Scorpion it had 2 movies for TV and only one season but despite being cheesy it's pretty good and I love how one of the villains is played by the late Adam West and he plays or he played a villain called Breathtaker very well and there was even a Joker style villain called Prankster Gangster (he's like a black Joker) he's corny but the actor was quite a thrill to watch I'd love the comics to do a crossover with Black Scorpion and Batman I'd love a story arc of Batman taking on a revamped Breathtaker (Adam West's character) and for Breathtaker to be like a former colleague of Thomas Wayne that Bruce has to track down for whatever reason and team up with Black Scorpion.
Also a Joker and Gangster Prankster team up would be fun to see that or instead of a team up Joker and Prankster could have a competition to see whose the "funniest" and for Black Scorpion and Batman to have to work together to stop them. I mean I know Black Scorpion isn't as well known but a crossover with Batman would be fun I think.