I guess you have all noticed that in the trailer there's four robots going down to get Megatron, but on the shot of them reviving him, only three are visible. AFAIK, everyone is assuming that the fourth bot isn't in the shot because of the camera angle, but I haven't seen anyone state something that should be obvious, which is that this fourth robot is the one that sacrifices his spark to reactivate Megatron, which is why he's not seen in the second shot. He's dead! We should assume it's not a Constructicon, since Megatron's revival is surely before Devastator's appearance, so he would be missing a component. Or perhaps it's the controversial 7th Constructicon that sacrifices himself, which is why he never gets to take part in the formation of Devastator, thus him not appearing in the toy? I always thought it would be Scorponok's spark and parts that revived Megatron, but the trailer doesn't seem to indicate that. Discuss at will.