Anyone remeber the episode with the flying island in Beast Wars? There were these strange alien markings everywhere that marked traps. They resemble those found on the Allspark, Megatron, Optimus, and whoever else wore them in the movie. Watch the second trailer (Trailer 2 on the special edition DVD). Keller says "the only lead we have is this sound" and it goes to the sound-playback screen, pause it. I'll let you find out what it is.