With no Reverse-Flash (or Professor Zoom, depending on what they call him) established in the DCEU just yet, Flashpoint will need to set up the fact that the yellow-clad speedster murdered Barry’s mother.
This one may seem like a no-brainer to people who know the Flashpoint storyline, but that doesn’t make it any less valuable.
Although Barry’s circumstances are technically the central conflict of the original Flashpoint storyline, Eobard Thawne is still the principal antagonist of the story.
From there, the film can make him a mysterious force who taunts Barry from the shadows until his real motives come to light.