And then, there is also the fact that fans would finally see for the first time in movies the other Justice League superheroes including Wonder Woman, Aquaman, and The Flash.
As far as plot is concerned, the battle between Superman and Batman has only been seen in the DC comics and not yet on TV or on film so fans would really love watching it.
There have been reports that Superman would fell short in the battle against Batman that he would actually bleed, which would be another first in moviedom.
Accordingly, Batman would be more mature and tougher in the movie after having been jaded and darkened by his crime-fighting crusade for a long time. The reports also say that Batman will use a souped up super suit but his bat suit armor to be used in the movie is CGI.
Ben Affleck reportedly put on 30 pounds of muscle to play the role of the Caped Crusader during its filming phase of about 14 months. The actor said that he does not want to look like the shredded and ripped version of a superhero so he decided to put on as much muscle as he can to look like a UFC fighter or an American football player.