The trailer didn't explain much but it was great, Zack Snyder really went all out on this one and I trust the movie will be much more. The statue of Superman made an appearance in the movie and we got to see Ben in his Batman get-up. Also, the voice of Batman which is one of the things I always love about Batman movie apart from some was featured as well. I especially loved when he said "Tell me, do you bleed?"
If you want the link, holla at me cos this is on a need-to-know basis so tell me when you need to know.
P.S: If this turns out to be a hoax or a marketing strategy for us to crave the movie more, it's totally working and don't worry Snyder, we'll still watch the real trailer when it drops.