Yes he is
Because in Transformers 2 Jet Fire gave his body parts to Optimus Prime.
Megatron intervenes the fight between Sentinel Prime and Optimus Prime, Sentinel Prime rips out Megatron's spine and head from his body. then Optimus excutes Sentinel
Optimus Prime, Ironhide, Ratchet, Bumblebee (new model), and Sentinel Prime (Optimus' Mentor)
see he does in transformers 3 at the end
Deciphering the Signal is the song sang in Transformers 3 optimus prime flies.
No. Optimus Prime's arm is ripped off in the final battle agaisnt Sentenial Prime.
Yes he was their leader beofre Optimus Prime was.
Yes - Optimus Prime kills him.
Transformers - 1984 The Return of Optimus Prime Part 1 3-29 is rated/received certificates of: Australia:G
Transformers - 1984 The Return of Optimus Prime Part 2 3-30 is rated/received certificates of: Australia:G
Yes, Megatron was killed by Optimus Prime.