Continuity mistake: When the Decepticon meteors are heading towards the aircraft carrier, we can see several aircraft carriers. When the meteors land, only one aircraft carrier is shown, and the surrounding boats disappear.
Continuity mistake: When Optimus jumps in the factory, during the overhead shot, Megatron also starts a flip. But Optimus nearly hits the ground at the end of that shot, while Megatron is only half-way through. Yet in the following shot, they both land at the same time.
Continuity mistake: Near the beginning when they're in China, the NEST team is moving on a Decepticon reading and it should be right in front of them.There's an overhead shot and a shot looking into the concrete tubes to where the very large Decepticon is, but you can't see its vehicle form at all until it starts transforming and attacking the troops.
Continuity mistake: When Sam and Mikaela are in the evening desert scene the night before the big fight, Mikaela has a cream colored spaghetti strapped top on. When the scene cuts back to them, she now has a black spaghetti strapped number with a black scarf around her shoulders. Cut back, and the beige shirt has returned.
Continuity mistake: In the party scene when Sam is standing and holding his drink, every time it switches angles the amount of liquid in the glass keeps changing. First it's full. Next it's half empty. Next it's almost full again.
Continuity mistake: When Alice and Sam are driving away from the party in Bumblebee after she gets squirted with "fluid", we see that they are driving down a city block. Each subsequent shot out the side windows from inside the car show distant blurry lights - not buildings we should be seeing.
Answer: After the tomb, he doesn't appear onscreen again. There's no indication as to what happened to him.
JAGwire