As we all know Batman v Superman: Dawn of Justice is a bit away from its release, but this has not stopped the internet from finding news on the anticipated blockbuster. One of the biggest rumors is the inclusion of Doomsday in the second installment of DC's Cinematic Universe. For those not familiar with Doomsday, he is a foe of Superman. Doomsday is a monster born in the ancient depths of Krypton with a hatred for Kryptonians and is well known for his role in "killin" the [Man of Steel](movie:15593).
Although, if you have been keeping up with rumors on this next installment, you can see that Doomsday's origins may change. Rumors have indicated that Doomsday will be created in - a sense - by none other than Lex Luthor. The rumor goes into detail by saying Luthor has General Zod's body and has experimented on it in order to find a weakness or to develop one for Superman. In doing this Luthor triggers the "Doomsday genome" which transforms the corpse of the late General Zod into Doomsday himself. Now... the question arises will Superman die, and if so is it too soon?
My theory is that this Batman will be working with Lex Luthor and attempting to find Superman's weakness. While Batman is fighting or rather buying time for Lex, Luthor will make a "mistake" and activate the genome. With a new threat on Earth, Superman, Batman, and [Wonder Woman](movie:45787) band together to fight Doomsday only to fail. Doomsday will escape, but not before "killing" the Man of Steel. After a bit of mourning the loss of Superman, Green Lantern comes into the scene injured and full of battle scars. After questioning Lantern on who he is, he warns the two heroes that a threat from space is coming to Earth. Realizing what he has done Batman looks at the bloody corpse of the one he tried to subdue.
This, although, does not mean Superman is dead - just horribly injured. Leading into the JL movie with Batman forming an uneasy alliance of Earth's superheroes into a battle for the fate of the Earth, while attempting to revive Superman. As we know no one in the comic book world stays dead, so if Superman dies in [Batman v. Superman: Dawn of Justice](movie:711870), it will not be for long.