Just as Megatronus's machine was activated, the team arrived and damaged it, causing it to briefly go offline. Angered, Megatronus incapacitated all of the members but Megatron by paralyzing them with painful flames. And just as Megatronus is ready to finish his follower off for good, Rodimus Cron arrives and is completely assumed by Unicron, becoming the new overpowered entity known as Rodimus Unicronus, willing to destroy the Matrix of Leadership and the last remnants of his brother Primus within it, as well as destroying the last surviving Original Prime. As Megatronus and Unicron engaged in the closest showdown between Primus and Unicron ever since the dawn of the Universe, Optimus Primal was able to break Megatronus's machine once and for all with the assistance of Grimlock and Windblade and then he recovered the Matrix of Leadership. Enraged again by another nuisance to his plans, Megatronus attempted to stop Primal, but before this was possible he was able to open the Matrix for himself, becoming the new Matrix-bearer Optimal Optimus.