They already gave away the entirety of Batman V Superman just about.

That is not even possible. There's still major plots to fill in. Like how did Bruce Wayne cope with the arrival of Zod and his battle with Superman. Why is Clark Hellbent on stopping the Batman? Where does Wonder woman fit in? When does she actually show up?. What some major easter eggs to find throughout the movie? Clearly there will be alot. Remember when the two random dolphins saved Clark while the oil rig blew up in Man if Steel? Where's Robin? Is he dead? His Costume is the the batcave. And which Robin was it? Dick? Jason? Why is Lex Luthor so obsessed with putting Bats and Shoes against each other? Aquaman, Cyborg, and Flash will make appearances? Are they in the trailer and did we see them in action yet? Those flying creature's- Parademons. Darksied's enforcers. What do they have to do with this movie? Are they part of a dream or a glimpse into the future? There's plenty more. Neither was answered in the trailer. So people can stop saying that a 2 minute trailer spoiled 2 and half hour worth of a movie filled with questions listed above that is yet to be answered. It's silly.

I said just about for a reason. The major plot points of the movie are nearly all known when it comes to Batman and Superman themselves. We don't know for certain yet, but it's widely believed that Bats and Supes battle ends when Doomsday shows up. Does that mean the movie isn't worth seeing? NO, it does not. I love DC Comics and will most definitely be seeing this movie.