The occurrence of Cyclonus dying along with the fact that he and Scourge had circumvented the mass substitute process has increased the pace of the rift in time and space. The cons are trying to siphon power from Earth's core. The Bots stop them and head for the past to get Galvatron and company and the cons give chase. The mass substitution for the Bots takes place the present day Bots think the future ones killed the substitutes. They fight for a bit, the present day cons join in and then get substituted by the future cons. Rodimus uses the Matrix to protect Optimus in limbo who tells both factions of both times what is going on and what will happen if the three renegade cons don't go back. The Wreckers and the Mayhem Attack Squad go into con HQ first only to find that Galvatron and Megatron are fighting together. They are trashed, the other Bots and cons show up and are simularally taken care of. Optimus finally decides to step in and now poor Galvatron has conflicting theme, you see he took a blast meant for Megatron so he changes all that Megatron remembers which is Galvatron killing all the Bots and cons that oppose him. The rift finally catches up to the rio. Needless to say all three are returned to the future and the rift is stopped.