Already sketchy as hell. Is Optimus just talking to him on Cybertron? Sort of like Transformers:The Game? They really dragged poor Strongarm into this? They're seriously dropping in Ultra Magnus?!?! I presume that Hot rod would be present entirely in flashbacks, as he's going to have to be in Europe by this time. It would take actual effort to screw that detail up. And as much as I love him, I don't see how Barricade would be enough of a threat to take on even half of the Autobots that are assumed to be on Earth. Another Decepticon would be necessary. Maybe put in a cannon fodder truck (Clench?!?) or car to help even the odds early on.