Since Eddie Thawne killed himself, there would be no Eboard Thawne coming from future to kill Barry's mother. So the time line will be altered drastically, with no Flash in 2014 (Eboard told Wells that he only built the particle accelerator in 2020). So how is it even possible for Flash to exist?

Since

Eddie Thawne killed himself

there would be no

Eobard Thawne coming from future to kill Barry's mother.

So the time line will be altered drastically: remember Eobard said to Wells that he only built the particle accelerator in 2020. So how is it even possible for the Flash to exist?

Since

Eddie Thawne killed himself

there would be no

Eobard Thawne coming from future to kill Barry's mother.

So the time line will be altered drastically: remember Eobard said to Wells that he only built the particle accelerator in 2020. So how is it even possible for the Flash to exist?

Since Eddie Thawne killed himself, there would be no Eboard Thawne coming from future to kill Barry's mother. So the time line will be altered drastically, with no Flash in 2014 (Eboard told Wells that he only built the particle accelerator in 2020). So how is it even possible for Flash to exist?