Originally Posted by chiefchirpa
It's based on G1. Optimus Prime, Megatron, Starscream, Mission City, Sam Witwicky, Bumblebee, Frenzy - heck all the chars except for Scorponok (which we don't see its robot form).
When you have 85-90% of the stuff based on G1, it's based on G1.
Sam wasn't part of G1. The name was Spike. And Blackout and Barricade weren't G1 either. Ironhide was obviously based largely on Rhinox in robot mode. Optimus did gorrilla type acrobatics. The story and pod landing borrowed from Armada.