personally i think it would be an amazing sight to see. imagine having joker fight against monokuma on a 1 on 1 battle. monokuma would win there is no doubt. but imagine the size of the masterminds palace, it would be a labyrinth of despair! i could see a lot of things that could go about in a crossover like this. who knows it could happen, they possibly take place in the same universe but if that's the case then it would possibly could take place before The Biggest, Most Awful, Most Tragic Event in Human History