First, I'm sorry if this has been mentioned before. I was looking at the trailer for ROTF the first time in glorious 720p on the laptop tonight and I noticed something in the scene where Sam is being pinned down. I took a screen cap and attached it below, what do you guys think? I think it closely resembles the leg as seen in the review of FAB ROTF Megatron done by GenZhao. It kinda looks like tank treads. on the back of his leg.
This has already been discussed, and pretty much agreed on that it is indeed Megatron's leg in the background, and his hand holding down Sam.
One more time: http://www.tfw2005.com/boards/transformers-movie-discussion/217466-megatron-2.html#post3274862 Megatron's leg indeed.
His leg is clearly behind Sam in the pin-down shot. Then look at the highlighted comparisons between that shot and the face-kick.
you can also see from the latest pictures of him that megatron has that little two pronged mini-grasper on the end of one of this fingers, that is 100% his hand
you could see the tank treads and the mini fingers on his fingers pinning sam down in the superbowl teaser, im amazed how this talk is still going on..