Specifically, the leaked plot suggested that we would see the transformation of Megatron into the villain Galvatron - possilby at the behest of planet-sized Transformer villain Unicron, who would serve as a "big bad" in the next trilogy arc. While many other details of that synopsis have been confirmed, the whole Galvatron/Unicron has yet to be officially proven... and that is still the case.
That being said, a new SPOILERIFIC set photo has revealed something that lends credit to at least the Galvatron part of the TF4 plot rumor:
Yup, that's Megatron's head you're looking at. Why roll out (no pun) Megatron's head, you may ask? Well, a nice upgrade into Galvatron wouldn't be out of the question.
How do you like the new Transformers 4 "Age of Extinction" subtitle? Does it help confirm a lot of what has speculated? Let us know in the comments.
Transformers: Age of Extinction will be in theaters on June 27, 2014.