
This film is said to take around the same time; following the end of Batman Begins and continuing from Superman: The Movie. Both Superman and Batman were young, since those were origin stories, with Batman being around 23 to 26, and Superman being early twenties physical-wise (with the mind of a 30-year old). This film will tie into both franchise's and the comics continuity.
This plot has some major elements in common with Frank Miller's "Batman: The Dark Knight Returns," which climaxes in a fight between Batman and Superman. In that comic Superman also fears that Bruce Wayne has gone "over the line."
"The Dark Knight Returns" along with Alan Moore's Watchmen forced the publishing company DC to reinvent their superhero universe along with Superman and Batman's relationship so that the previous best friends for many years turned unwilling allies who don't agree with each other's methods. For the last few years DC has succesfully published the Superman/Batman book in which the two characters team-up as co-stars
Two alternate versions of the characters also clash over conflicting ideals in "Superman: Red Son



