So I was thinking today, Megatron is going to come back because Hasbro wants merchandise for him. But Megatron had his head torn out and was finally killed for good in DOTM. Reviving him AGAIN would be stupid, so I came up with a solution. Have another powerful Decepticon arrive on Earth to take up the mantle of Decepticon Leader, and then take the name of Megatron as a tribute to the former leader. Hasbro gets their Megatron, and we don't get another zombie Transformer.