I think we have an awful lot to thank Doug
Liman and Matt Damon for as this and so many other films nowadays are taking not only the material, but the audience far more seriously than the last twenty years of films. So often in the 80's and 90's we were talked down to by studios as they thought we were all slightly slow and would find even the mildest complication in plot of character arc too steep to follow.
This trailer is another bolstering moment for sober film. Something which has rightfully taken it's place in cinema. I don't mean to say that all films should go this way, far from it, but degrees of realism should definitely be adhered to in certain film worlds.
Check out the trailer now :)