It's like both Beast Wars and G1 Megatron. Megatron's personality was alot better portrayed in this movie and I keep thinking of BW Megatron interacted with The Fallen. He even said "yesssss.." at one point. What really seemed like BW Megatron was when he was interrogating Sam in the factory. That whole sinister feel to him. Beast Wars Megatron has always been my favorite incarnation of him, mainly because he's a freaking T.Rex lol but it's just they way they portrayed him in the series.