We were once a peaceful race of intelligent mechanical beings, but then came the war between the Autobots who fought for freedom and the Decepticons who dreamed of tyranny.
And so it goes. During the incredibly battles between Optimus and Sentinel, both get all philosophical, with Sentinel representing oppression and tyranny while Optimus champions freedom and choice. Their races united by a history long forgotten, and a future we shall face together. He, is Optimus Prime, and he send this message so that their pasts will always be remembered. Help them! Because for in those memories, they live on.