That is how Batman VS Superman: Dawn of Justice started off. The 152 minutes movie showing Batman/Bruce Wayne who somehow has some of the vision of the future that Superman is a threat to mankind intend to end his reign on Earth started to study Superman or Kryptonians. And then, the conniving Lex Luthor (Jesse Eisenberg) who is also started his crusade against the Man of Steel.
Finally, we have the battle of all time, Son of Krypton vs the Bat of Gotham, and with his study, the Dark Knight has the upper hand in the end, but I found that Zack Snyder is quite details and link them together via their mother's name, Martha. Batman nearly kill Superman before Superman pleads for him to save Martha - and the Dark Knight come to senses and realized that Superman was not a threat. Upon learning of Luthor's plan, Batman leaves to rescue Martha while Superman confronts Luthor, who unleashes a monstrous artificially bred creature - Doomsday made with Kryptonian technology on the crashed ship.
Superman and Batman join forces to fight Doomsday, joined by Wonder Woman (Gal Gadot) but the three are outmatched due to the creature's ability to absorb and redirect energy. Realizing that their shared Kryptonian DNA results in shared vulnerabilities, Superman retrieves the kryptonite spear and impales the creature with it, while the creature stabs Superman with his bone protrusions, seemingly killing him. The movie conclude with Bruce Wayne telling Diana Prince that he plan to unite all other meta humans, seemingly because of his vision - and this could eventually lead to Justice League.
Overall, I found the movie interesting and entertaining, although there are so many negative reviews on the movie. Some might not understand why Lex Luthor hold grudges against Superman because the movie did not show. I would assume that Lex is holding grudges against God who did not come to his rescue during his "abusive" and difficult childhood - and Superman is regard as God. The only thing I found not making any sense is that why Lex have so much free time to put a label and logo on all the meta humans that he is studying? Why this Dark Knight shamelessly killed dozens of people and although I know there are bad guys, but still this is contradicting his principle. I was not convinced when Ben Affleck take up the role of Batman at first - especially after Christian Bale's Batman performance which will leave a very big shoe to fill, but somehow it seems that his performance is the saving grace of the movie; well, that's true according to a lot of the movie reviews. Batman's fight with the goons looks so fast and fluid and his facial expression showing the gloomy side of the Dark Knight of his vision. The battle scene between the Son of Krypton and the Bat of Gotham is expected because I personally don't think the Dark Knight will go against "God" without plan - and Kryptonite is definitely something that I would have guess that he will be using. The only negative point on the movie is that I can think of is the character build up - but then again, this is a Superman movie, so I'm guessing that DC want to show a bit of the expanded universe of the Justice League, while not neglecting the main character of the movie.