So TFPRIME reinvented the Terrorcons faction as zombie Decepticons. Which could be a really cool way to revive all the Decepticons who fell in battle over the last three films. Just have Cyclonus or whoever bring with him a means (Dark Energon, Dead Matrix) to revive Megatron, Starscream, Soundwave, Bonecrusher, etc, and the Con gang's back and good to go. It wouldn't be a proper resurrection like in ROTF, but like a dark awakening like in G1 (an aptly titled episode). Have the Decepticons look more exposed and horrific, but still able to transform to hide their zombie nature. Does it sound like it could sail?