User blog comment:ReverseZoom101/Plotholes that I noticed in season 3 of the Flash./@comment-27700324-20170613144522/@comment-24693688-20170903100742

Eobard was erased after he did his shit in the timeline. Megatron was erased before he did his shit(Barry making a rogue Time Remnant or becoming himself Megatron)

The Reverse-Flash logic would have worked only if Barry made a Time Remnant to go rogue after or during Megatron events.