>>10085512That’s actually exactly what happened.
Rewind’s decision was sort of short sighted in retrospect.
Also ironically counterproductive, as Megatron was actually birthed from an ontological predestination paradox, with Whirl implanting a different spark, previously harvested by Brainstorm, into his now vacated body.
So it was arguably the absence of their going back in time to stop his murder, as opposed to Brainstorm’s going back in time to murder him, which caused his non-existence in the divergent Functionalist timeline.