The reason for Batman taking on Superman is because in the events of Man of Steel (2013), a Wayne Financial building is destroyed. Bruce Wayne is also scared of what will happen if Superman decides to use his power for evil. People also view Superman as a False God, many believe him to be a hero however, Superman may also be conflicted as to what he wants to do.
Ben Affleck asked Christian Bale for any advice he could give about playing Batman. Bale told him to "make sure you can piss in that suit." The two men met quite by accident in a costume shop. They were both buying a Batman costume for their sons.
In an interview with Jimmy Fallon, Ben Affleck said he was warned by Warner Bros. about the possible negative reaction to his casting and was advised to remain off the Internet after the casting announcement. He also said to assuage his concerns the studio showed him negative comments that fans had initially made to previous superhero castings. Affleck said in spite of the studio warnings he still checked out an online message board. The first comment he read was "Affleck as Batman? NOOOOOOOOO!!!!!!!!!!!" After seeing that he immediately went offline.
A rough cut of the film was shown for the executives at Warner Bros. They were reportedly so impressed that they not only gave the film a standing ovation, but also began negotiating a deal with Ben Affleck to have him make three solo Batman movies, rather than the original plan to make only one.
I Am Legend (2007), a teaser poster for the film (the Superman shield inside a bat) was seen in the opening scene.
Henry Cavill put on twice the amount of muscle mass for this film than he did for Man of Steel (2013). At his absolute peak during the process of training for the film and filming it, Henry Cavill reached a size of 100 kilos. He however, did not keep at that size for the entire duration of the shoot or the training.
The Joker is rumored to show up at the end of the movie.
According to Ben Affleck, he was surprised when he was offered the Batman role and was at first hesitant to commit to it.
Ben Affleck began working out two hours a day the very next day after he was cast as Batman, to get ready for the role. Ben Affleck gained an additional 30lbs of muscle and reached 8% body fat for his role as Bruce Wayne/Batman.
Christian Bale mentioned in an interview that he felt like he wanted to continue playing Batman. He stated "I'm jealous of someone else playing Batman". Bale portrayed Bruce Wayne/ Batman in the Dark Knight Trilogy.
Ben Affleck stated in a interview that he had asked if he could have the batsuit when filming was complete. The producers said yes, but that he'd have to pay $100,000 in order to keep it. Affleck quickly changed his mind and asked if he could just take a picture with it instead.
Jimmy Fallon once asked Ben Affleck what his daughters thought of him being Batman and he said, "They don't care. All they want to watch is Frozen (2013)."
The producers state that this is the very first DC Comics film that opens up to a cinematic universe for its heroes: "Batman is being brought into the universe that now this Superman lives in."
This will be the first live action film to include Batman, Superman and Wonder Woman (or the Trinity) together.
The batsuit that Ben Affleck wears is based on Batman's suit in the comic book "The Dark Knight Returns", written by Frank Miller.
Ben Affleck will portray Batman in this film, Suicide Squad (2016), The Justice League Part One (2017), Untitled Batman Reboot, Justice League Part Two (2019), and possibly 2 sequels to the Untitled Batman Reboot.
Josh Brolin, Ryan Gosling, Matthew Goode, Richard Armitage, Max Martini, Armie Hammer, Jensen Ackles, Joe Manganiello, Idris Elba and Matthias Schoenaerts were all speculated to play the part of Bruce Wayne/Batman before Ben Affleck was chosen for the role.
This will be the tenth time Batman has been portrayed since 1943. Superman, on the other hand, has been portrayed sixteen times since 1939.
After seeing his performance in Cloud Atlas (2012), the studio wanted Tom Hanks to portray Lex Luthor.
Rumoured to have a 410 million dollar budget, which would make this the most expensive movie of all time.
Costume designer Michael Wilkinson deliberately made the Batsuit out of cloth, removing all traces of armor: "Our Batman's power comes from his incredible physical strength and fighting skills."
The kryptonite in the glass case being looked at by Lex Luthor appears to be in the shape of Zod's skull.