At Comic-Con International: San Diego, Warner Bros. showed a new trailer for Batman V Superman: Dawn of Justice. While the trailer has yet to be released online, here's a description below.
Superman lands at Capitol Hill. He walks into the US Senate as a woman calls his power dangerous. Bruce Wayne runs into a collapsing Wayne Tower being destroyed by a flaming laser of sorts and saves a little girl. Bruce reads a letter that says “You let your family die.” over a newspaper headed, "Wayne Tower Devastated." He gazes at the batsuit, Clark calls Batman a vigilante. Perry White says "No one cares about Clark Kent taking on the Batman.” Clark needs to be everyone’s hero. A space shuttle explodes and he catches it. Lex Luthor talks with the senator and says devils come from the sky. Zod's face is revealed in as a body bag opens. Batman looks at a graffitied bat suit which reads, "Jokes on you," in yellow spray paint. Bruce talks about Wonder Woman, who flashes by, saying she can wipe out the entire human race. Mechsuit Batman unveils the Bat-Signal. Bruce watches his parents die. Wonder Woman causes a massive explosion. Batman fights off military personnel. Luther looks at Kryptonite. Alfred discourages Bruce from fight Superman, saying, "He is not our enemy." Batman, Superman, and Wonder Woman fight. Luther says “The red capes are coming.” Superman opens the Batmobile and Batman rises up to eye level with him.
Update: Trailer has now been released online, so here it is!
In Batman v. Superman: Dawn of Justice, fearing the actions of a god-like Super Hero left unchecked, Gotham City’s own formidable, forceful vigilante takes on Metropolis’s most revered, modern-day savior, while the world wrestles with what sort of hero it really needs. And with Batman and Superman at war with one another, a new threat quickly arises, putting mankind in greater danger than it’s ever known before.
Batman v. Superman: Dawn of Justice opens March 25, 2016.