She's gone now, for good.

[Knock Out knows, they don't have to go into further detail. He will also keep to himself what happened to Breakdwon's corpse.]

We couldn't do that. You have been dead for more than two years. [Blunt but to the point, that's Knock Out for you.] The lambda, that thing outside shinning in the sky, it's a rift in the space-time continuum. It can pull people here form all realities and at any moment in time. That's why you are here now, this is not our Cybertron.