The Scene: After Lex Luthor gets fed up of playing Batman and Superman against one another, he appears to use General Zod's corpse to somehow create the monstrous supervillain known as Doomsday, who dives off a building to confront the duo. Why It Should Be Awesome: It's Doomsday, arguably the most iconic of Superman's foes to never get a movie iteration, and to see the Justice League fighting such a powerful enemy should result in one hell of a set-piece. What Could Go Wrong: If Doomsday is a throwaway villain taken out in a matter of minutes, it's going to be pretty damn disappointing given his overwhelming power in the comics. Plus, with the trailer spoiling his arrival, it's possible that the reveal may fall a little flat in the actual movie.