RECAST

Surely where there is Optimus Prime, Megatron is not far behind? While Optimus's form is that of the Michael Bay movies, Megatron takes the form of the Armada incarnation of Megatron. Much like in Transformers Prime, in Next Gen, Optimus and Megatron were at one point friends before Ultron decided to throw a coup d'etat. And just like the source material, they started a rivalry, and would fight each other several times throughout the Next Gen movie until Optimus managed to get the best of him and toss him into Ultron, rendering the Decepticon leader unconscious. He would later be imprisoned with the rest of Ultron's army.

Megatron in the Next Gen movie was voiced by Jason Marnocha, AKA LordJazor, who would go on to voice Megatron in Netflix's War For Cybertron Siege and Earthrise series. Unfortunately, due to scheduling and only doing paid jobs now, this forced him to step down from the role. I am not necessarily looking for a complete recreation of Jason's voice, but rather to get the tone down of Megatron's maniacal, warmongering, and megalomaniac personality. 

See Megatron in action here: https://www.youtube.com/watch?v=y48ozL17FM8&t=359s

For inspiration: 

https://www.youtube.com/watch?v=IIkU8qyafgg