I SAID 'til all are one, grrrrrrr
"'Til all are one" is a phrase knit through Transformers mythology and legend, often used as a rallying cry by the Autobots. It's been translated as either until the end of the Great War, when all Transformers shed their factional affiliations, or until all are rejoined into the Allspark of Primus.
Fiction
Generation 1 Animated Continuity
The phrase was first introduced as Optimus Prime's deathbed mantra, and it would then be repeated regularly by Ultra Magnus, Rodimus Prime, and many of the other Autobots. Transformers: The Animated Movie
Having seized the Matrix of Leadership, Galvatron gloated that "all shall be one" under his rule. The Burden Hardest to Bear
Beast Wars
Rhinox claims that the Matrix dimension is a place "where all are one." Coming of the Fuzors (Part 2)
Beast Machines
As Megatron consumed the captured sparks of every Cybertronian, he urged "let us all become one!" Endgame Pt. III: Seeds of the Future
Robots in Disguise
Omega Prime's Matrix Blade had this phrase written across the hilt.
Unicron Trilogy
Cybertron
When communicating with the Autobots, Primus would intone the phrase in reference to their quest to restore his Allspark. Later, when he created the Ark out of the four cybertronian starships signifying the unity of the Transformers, he said that all were finally one. End
Dreamwave comics continuity
The Jedi Council has decided not to grant you the rank of master, young Prime.
In the War Within, the Autobot Council of Ancients held court in a chamber embossed with the same logo that had appeared on Omega Prime's sword.
The Seal of Primus also had 'til all are one written on it.
IDW comics continuity
The Megatron Origin miniseries shows a much darker use for the phrase. During a gladiatorial death match between Megatron and an unnamed opponent, the crowd begin to chant the phrase, apparently attempting to goad Megatron into finishing off his opponent. It is unknown why the crowd would choose this chant to encourage a gladiator to kill someone.
This IDW series is based on the decline of the Roman empire. The audience are the ones to decide the fate of the defeated gladiator, so they can tell the victor to kill the loser.
The chant may signify the union of Alpha and Omega (begining and end) of a Transformer's life.
Shattered Glass
In the Shattered Glass timeline, a parallel universe, Optimus Prime sports a mocking juxtaposition of the famous saying on his alternate mode, stating "'Til all are gone!"