I wasn't sure what to make of this film for the reason you mentioned - I couldn't tell if it was a love story, a war picture, action movie because there was next to no dialogue in the trailers, so I wasn't sure if I'd go see it (and maybe it is all those things...I just couldn't make a good judgment).
I was fooled by the "Pineapple Express" trailer, and didn't want to be fooled by this one.
Two things: Now I have to go see this film. I had no intention as the trailer made me think it was super sappy crap. I challenge to you sit on your hands when you talk, I got dizzy watching. :-)