1. Batman and some of the people of planet Earth, have a serious problem with Kal-El's god-like powers. It would seem that some of the population worship him, but others want him to answer for all the devastation that has surrounded his presence since his 'coming out'.
2. Batman and Superman will fight each other whilst Wonder Woman will kinda watch.
3. I suspect that there is some mind control of Superman or at the very least a clone of him. It also appears that this controlled Superman will be given a human army as part of an attempt to rule. All this will be financed and orchestrated by Lex Luthor.
4. Lex Luthor will somehow push the match between Bats and Sups, but that will fail to produce the result he wants, which is the death of Superman...or someone. So he'll turn to Zod's body and create the creature Doomsday or take samples of Zod to create a brand new monster creature.
5. Wonder Woman will reveal herself in a key action moment to begin the team-up alliance.