Megatron steps back as Ratchet nudges him, feeling an inescapable urge to contest the determinism implied in that. He still had time to change things, there was still an opportunity to go another path, one where he properly brought reform to Cybertron - without resorting to a cruelty worse than what they'd initially fought.

But he couldn't wax poetic about his plan to change their world when Ratchet was still missing a leg, and was bringing someone he clearly cared about from the brink of death, elbow-deep in their own energon.

What could he say?

"It won't happen again."