Batman
vs
Superman
These are the trailers they should have released sooner, next followed with a trailer or two w/ a little hype of Lex and Wonder Woman.
the last thing they should have ever shown, if ever shown in a trailer, was Doomsday.
they could have shown the destruction and action from the fights, but never should have shown him directly or really even hinted at him in early trailers. let the trailers continue to hype the Title of Batman v Superman.
Not Bats vs Supes... until Lex creates an even bigger an more immediate threat which calls in the need for Wonder Woman (and Aquaman and possibly The Flash), so all the fighting you are seeing is actually Bats & Supes & Wondy vs Doomsday created by Lex.
in other words, marketing for this movie could have been better, much better considering the expectations surrounding it on both sides of the screen.