G.I. Joe, a Real American Hero #139

Synopsis

Megatron is reborn thanks to Cobra, as they incorporate Biggles-Jones's railgun technology to the Decepticon leader (replacing his antimatter cannon for more power), changing his transformation mode from a gun to a tank. In return he promises them the technology in the Ark, plus scanned off of his person to retrograde into Cobra systems while he was being rebuilt. Meanwhile, on the abandoned Cobra Island, Zartan, alongside Destro, the Baroness, and the Joes, learn that the Commander has taken the late Dr. Mindbender's clone technology for himself, and apparently plans to revive his late crony.