Next to the impending Star Wars Episode VII, there is no movie production as obsessively followed and keenly scrutinised as Batman vs. Superman, which is due for release on May 6, 2016. What do we know so far? Man of Steel director Zack Snyder is once again helming, it will take many narrative cues from the comic The Dark Knight Returns, Ben Affleck is playing Batman, Gal Godot is playing Wonder Woman, Jesse Eisenberg is Lex Luthor, and Jeremy Irons has snagged the role of Alfred Pennyworth. Most of the news coming out of the movie's camp so far has been pretty divisive to say the least, and with it being just a matter of time before high-profile shoots begin and images begin to leak out of Affleck's new Batsuit, it's time to consider what we actually want to see show up in this movie. Which characters, for instance, either from Batman or Superman's cinematic or comic book pasts, must absolutely show up in one form or another for a little bit of fan service? Sure, if all 10 of these personalities turned up, Batman vs. Superman would probably end up seeming far too crowded, but if at least a couple showed up in some small capacity, they would no doubt add a lot of charm and appeal for those who have stuck with these movies and characters for so long. Who do you want to see show up in the movie in cameo form? Let us know in the comments below!