The Transformers United Without Enmity or War
In the aftermath of the battle with Unicron, Rodimus Prime's optimistic speech is met with the response "'til all are one!" (the image below is from the comic adaptation of the movie).
Reformed and transfigured by the Creation Matrix, Rodimus clearly understands his (almost Messianic) role in terms of an end to hostilities with the Decepticons (with whom the Autobots have been briefly united by the existential threat of Unicron) and the ushering in of a peaceful age where the badges of Autobot and Decepticon are no longer needed.
For more about this phrase, see this page on TFwiki.