I'm new so I hope this wasn't discussed before, but anyways. We know The Fallen is buried under Egypt for a very long time, and theres no way the ancient Egyptians could have defeated him. We also know Jetfire has been on earth for along time too and is old and damaged. Due to Jetfire and Fallen looking similar, they could have been related or Jetfire a follower of The Fallen. But something happened, there was a big fight and Jetfire defeated the Fallen, buried him and went into hiding because he was too damaged to leave earth???