Based off the IDW comic of the same name, Shockwave betrays Megatron and brings most of his Decepticon troops, including Starscream and Soundwave and plans to eradicate what is left of Megatron's Decepticons and all of the Autobots (except Optimus) and plans to remake Cybertron into his own Image, also with plans to take over the galaxy. So now, through an unlikely alliance, Megatron and Optimus must stop Shockwave and save Earth stop his second phase of his plan, which is to takeover Cybertron.
