To be expanded
This Megatron is a Decepticon from the Transformers Live Action Film Series: Expanded Franchise and Michael Bay's 2007 Transformers.
After Bonecrusher was killed by Optimus Prime, his body was gathered with the other bodies of dead Decepticons and re-animated by Soundwave. He and Brawl were put incharge of the main Decepticon Military Legion. He served as it's leader with Brawl for years, until he, Brawl and most of their army were killed by Starscream's newly formed Rebellious Predacon Army. The remainder of their legion surrendered to Starscream's Predacons.