I think it looks really good. Batman looks great, Jeremy Irons' Alfred sounds great, and I like the dark tone. Many don't, and think it's wrong for a Superman movie, as they did with Man of Steel, but I think the darker the situation, the worse it looks, the better it feels when the heroes win. And some people are having a meltdown over Superman being portraied as the villain... but he's not. This trailer is not about Superman being evil (or good), it's about how other see him, about how they feel about the demigod alien. Which is the right theme for the movie that introduces Lex Luthor. And of course Batman and Superman will be conflicted at first, it's how a first meeting between such characters is expected to go. We get our fun of seeing a confrontation between them, and then they'll team up. It's how it goes.We know there is a Justice League movie coming, so we know Superman isn't going to be a mad dictator like in Injustice, and he and Bats will end up on the same side.
stg83: My main concern is the other superhero cameos that are going to be shoe horned in the movie with Wonder Woman and Cyborg.
tinyE: ...and Aquaman.
...and The Flash.
I don't think anyone except Wonder Woman is 100% confirmed for BvS. There was definately no talk of Flash showing up, and I don't think there was anything reliable about Cyborg.