But the last time we seem them they are all together and left the base without permission as one. Bumblebee is the only one they could possibly explain as being in a different location to start with.
Wait, are we thinking of the same sequence? I'm thinking of the forest fight after Optimus and Bumblebee save Sam from the Doctor, but I've since watched it again and I don't recall any scenes of the military there. If you are referring to that scene, then I think the only explanation is that the Autobots had to travel further than Optimus and Bumblebee because those two were the only two Autobots involved in the initial resuce.
The only alternative I can think of is the sequence at the end when Sam is trying to get to the remains of Optimus as the Decepticons close in.
That scene definately had the military involved, and all of the Autobots were air-dropped in. Although they regrouped with the humans to fight the Decepticons, everyone split up in an attempt to draw the Decepticons' fire while waiting or Sam. They had no idea where Sam was relative to everything else, and given the chaos of the fight scene - as all fight scenes are; I watched APOCALYPSE NOW REDUX last night and the same thing was happening - it's easy to see how the Autobots engaged in fighting would be compeltely unaware that Sam had made it to the perimetre, much less the body of Optimus.
Again, I'm not saying the film is perfect. There are so many things that could have done with an explanation. Would it have really been so hard to shorten a fight sequence or two and add some dialogue explaining that by touching the shard of the All-Spark and having the language of the Primes imprinted into his mind, Sam himself inadvertently became a Prime? It would explain how he wound up in Transformer heaven, as well as how he even knew about the Sun Harvester because the destruction of an All-Spark would mean that the knowledge contained in the All-Spark would be transferred to the first living creature that touched it. Better yet,
Mikhaela should have been the one to touch the shard, thereby justifying her importance to the story. Or even Leo.
There's a decent film buried somewhere in REVENGE OF THE FALLEN. It has the potential to be as good as the first film. I don't think the problem is in the shooting of the fight sequences; I actually like the way the final sequence in Egypt is confusing because I very much imagine that's the way a battle would play out in real life. The problem is in the script: the basic premise offers plenty of opportunities, but the film takes none of them. Like, why is The Fallen so bad? Why does he think the other Primes betrayed him instead of the other way around? It would have been so easy to create a scenario where The Fallen witnesses primitive humans and their warmongering and decided they needed to be stopped before they destroyed themselves. Or one where he felt that humanity didn't meet the Primes' criteria of being intelligent life when he built the Sun Harvester. Or one where he landed on Earth and accidentally killed a cluster of humanity and after scouring the area and finding no life, he decided that he had wiped out
all of humanity and so built the Sun Harvester to cover it up by destroying Earth, but the other Primes arrived before he could finish it and discovered life for themselves, for which they then branded him traitor.
REVENGE OF THE FALLEN is more of a film full of wasted opportunities than a bad film, and that's what stops it from being a
good film.