Galvatron II

Galvatron is a Decepticon in an alternate Generation 1 future.

Galvatron was Megatron reborn in the fires of Unicron. In an alternate timeline, Unicron consumed Cybertron (planet) and Galvatron was given Earth to rule. It is the year 2009, and only a handful of Autobots remain -- even their leader, Rodimus Prime, has fallen. What chance do the rest of us have?

Marvel Comics continuity
Galvatron originally controlled the Americas in an alternate 2009 where Unicron had been victorious in his attack on Cybertron. He knew that the other countries of Earth were planning a nuclear strike against the force-field with which he barricaded the continents. He thought that his shield could withstand, and absorb, the energy of the attack. This Galvatron was quite mad in his home time - he lethally punished his close lieutenant Cyclonus, and continued to 'kill' a long-dead Rodimus Prime whose remains he'd strung up on what was left of the World Trade Center.

Before he could make good his plans for nuclear energy, though, he was snatched through time to 1991, by a Unicron who 'may or may not become' the one who created him. This Unicron tried to use him as a soldier in his own attack on Cybertron, but Galvatron quickly turned against him. He'd already both fought against and allied with this era's Megatron by the time he ended up aboard the Ark as it returned to Earth and crashed. Now driven completely mad, he wreaked havoc until he was defeated by Fortress Maximus. He hasn't been seen since Maximus threw him into a frozen lake.

Generation 1

 * Galvatron II (eHobby)