How do you think the two will interact in the film? There was some discussion of this in the junior novel spoilers thread. I know he was quite submissive to the artifact in Defiance, but he's Megatron. Don't you think he would want to usurp the Fallen and take all the power for himself? I hope it's shown this way in the film, as Megatron takes orders from no one... not without a fight at least.
Megatron won't fight back, not against a freaking god that gave him power and promises alot more as well.
Based on what we have alreay seen in the prequel comics - Spoiler if they have any type of relationship onscreen, it looks like its likely to be like Galvatron/Unicron in TFTM. The fallen will tolerate Megatron as long as Megs does his bidding.
Plus this is movie Megatron so we can't judge all his actions based on other Megatrons. G1, Beast Wars, Animated Megatron have all been different even though they share the same name so there will be twists to movie Megatron that he doesn't share with the other characters with the same name.
