USA Dept of Defense & Summer Movies

The upcoming G.I. Joe feature film was originally set to be a sort of international peace keeping force. The US Department of Defense didn't like that and focused on helping the US militarized film version of Transformers 2.
Rightwingers threw the expected fit that G.I. Joe, the Real American Hero, would consider anything but unilateral action. So, after some pressure, the international friendly aspect was lightened and the USA might-makes-right aspect was emboldened. This delighted the DOD.

The DOD is heavily involved in all films that even mention the military. If you do not please them, you get no help with any use of equipment input on realistic tactics.

It is interesting that a concept about alien robots fighting eachother could so easily be transformed into a commercial for the US military.