The trailer was kind of mediocre, I think. Nothing sepcial, nothing outstanding. But it was okay.
I've been thinking a lot though about the dna hacking stuff. Yea, nothing indicated it, of course, because it's a fresh idea. Also, nothing in cinematic predator experiance has contradicted it before. But the more I'm thinking about it (with a good impementation) the better I understand it.
It might just be a really great addition.
Or it just comes out as a total disaster (like in Predators comic) Only the finished product can prove its woth.