He will have his G1 counterpart looks and he will come to earth and catch Prime by surprise and make him surrender or else the humans die, that's how I would do it if it was me
I think he should come frm one of cybertrons moons, enter earths atmosphere at night, undetected nd lands in the desert
NEST deposits all Decepticon dead bodies in space, after 5 years, Megatron's body reaches Unicron. Unicron revives Megatron and makes him Galvatron. Galvatron guides Unicron to the Earth, where the Autobots will have to everything to stop Unicron from eating the Earth. There's just so many possibilities I can think of that would make TF4 a great movie with Galvatron and Unicron in it. Imagine Optimus facing off with Unicron in space, while Bumblebee and the others fight Galvatron on Earth. Hot Rod and Ultra Magnus would be new characters, and Optimus puts Ultra Magnus in charge of the Autobots on Earth.
Aawwwwwwssssoooooooommmmmmmmmmmeeeeee!!!!!!! I can totally picture it!! It would hav to envolve The Matrix of Leadership...
Fixed...that or Staxus..(I also don't want him to be a "slave'' to Unicron or a reborned Megatron!! ) Edit: proof of what I'm talkin' about:http://youtu.be/QrtJoN9EwDU
by unicron resureccting megs and turning into galvatron and galvatron says what is your plans my master!!!