What’s the problem between Batman and Superman?
It's probably over some girl, it always is.
Storyline as I understand it from the previews is that Bats thinks superman is too much power with no limit and people are treating him like a God...egged on by the bad guys and destruction of a building from a supes fight.
Supes sees Bats as a vigilante who is a lawbreaker trying to take justice into his own hands without following due process and needs to be restrained.
Heroes fight - WW shows up to calm the situation, bad guy is uncovered and that’s about it from what I can tell of the previews.
It’s a storyline that’s been repeated multiple times in the genre most often between these two due to either 1) the all powerful, alien vs really smart unpowered human aspects or 2) the law-abider vs the vigilante aspect. One of the more recent versions is called Kingdom Come and actually came out as a hardback novel after the comics.
Marvel’s Captain America Civil War has a similar theme though it revolves more around govt registration/regulation of heroes vs independent action of heroes.
In addition, Batman is upset about the name of the world championship game about to be played and believes it should be called "The BatBowl."
Vontaze Burfict shows up to piss them both off, and they join forces.