I've always thought that the Ninja Turtles would make a great crossover to the Marvel world. The Daredevil connections are obvious, so here is Leo teaming up with Matt Murdock. Given that I used the Netflix version of the Punisher as inspiration for my Raphael iteration, I thought I'd keep on track with the Netflix Daredevil as well.
Leo and Daredevil going up against a rogue Raphael and Punisher? I'd watch that for sure.