The act basically meant that he became the very first Decepticon, and the Titans Return finale proved that Megatronus hasn’t changed his colors since.
The two powerhouse actors will both voice characters in the third series of the Transformers: Prime Wars Trilogy, although Mark Hamill made his debut as his new character in the finale of the second part of the trilogy, called Transformers: Titans Return.
He’s voicing a character known as Megatronus the Fallen, who is one of the Thirteen Original Primes.
Megatronus was exiled from Cybertron due to his act of killing another of the Thirteen.