His first design was kept mostly intact for the first three movies but, after dying, the villain first came back as Galvatron and, after that, he returned to life once more as Megatron in Tranformers: The Last Knight. (cbr.com)
Oh, and those pesky Decepticons are back - lead by Megatron in a fashionable scarf — and attempting to recreate their home planet of Cybertron on Earth by activating some secret pillars. (cbc.ca)
Johnson has a very popular nickname, going by Megatron, which was given to him by former Lions wide receiver Roy Williams when he was a rookie. (diehardsport.com)