13. Justice League
The ending of Superman vs. Batman: Dawn of Justice, Metropolis holds a memorial for the passing of Superman. Clark Kent is dead, and a bunch of people attend his funeral, including Bruce Wayne. However, in Justice League, which is set after S vs. B, Superman is magically back from the dead. Also, Clark Kent returns to his office to resume work as if nothing happened. How in the world is Clark going to explain his resurrection right at the same time Superman comes back? Spoiler: he doesn’t.