This was my initial thought, however, he declares his own name as such when he breaks free from the KSI lab in TF4... "I am Galvatron!" Of course, this point has been made several times throughout this thread in response to similar statements. Megatron has received extremely poor treatment in these films. The supreme leader of the Decepticons has always been quite sophisticated. Megatron is cunning, controlled, patient, supremely intelligent, and immeasurably powerful. The Decepticons were the most strategic and educated on Cybertron. Bay et al have turned Megatron and the Decepticons into second-class characters of limited power and intellectual scope, as well as animalistic form and behavior. CGI monsters, for short. Megatron had little screen time and was still monstrous, but was at least given prominence in the first movie. ROTF was insulting and made him subservient to the Fallen (original Megatron would die before willingly serving ANYONE. It took Unicron [and a crippled Megatron himself] to exert ANY control over him for a short and problematic period while as Galvatron). Then DOTM had him not only subservient to Sentinel, but was also strategically tricked by him, then set aside, chained like a dog, and eventually killed off. Finally, AOE marginalizes him for the fourth time by making Lockdown a bad ass and Galvatron some pointless human-engineered magical bot who barely had any screen time. A top of being made a monstrous and marginal coward in every movie, he was 'resurrected' in some form or another in 3/4 films. Now, he is a woolly mammoth. And will likely be made a growling monster yet again with an inability to control himself or his army and some other evil character will be the core villain.