I've been thinking: Megatron's roles were diminished in ROTF and DOTM as other new villains came into the picture. He became a disciple to the Fallen in ROTF and was revealed to be working with Sentinel Prime in DOTM. After the first movie, he didn't seem to serve much importance in the plots of the following two movies. So I wonder: would it have been better if Megatron had simply never been resurrected in ROTF? Allowing The Fallen and Sentinel Prime to be the main villains of ROTF and DOTM without competition from Megatron? This might have avoided presenting Megatron as weaker beside these two other villains and would have allowed them more focus, attention and time for development in the movies. As it stands, Megatron was always there competing with other 'big bads' for his position. And maybe Optimus' final battles with the Fallen and Sentinel could have been extended a bit more and might have appeared more of a struggle without Megatron interfering in them. What do you think?