User blog comment:ReverseZoom101/Random Thoughts/@comment-3221148-20170223193945

If Flash's seasons ever make it to 2020, Future Flash and Future Wells would be an incredible concept for the villains.

Basically, they are not exactly from "THE" future, but rather from that future that Eobard was originally from, where Barry became the Flash in 2020 and Wells was alive.

They coexisted for some time with the new timeline, but as the year 2020 approaches and Our Barry still haven't crushed the timeline yet, his timeline starts to supersede the original one, forcing the 2024 Flash, the one who saved Barry-2000 and was able to go on the same level as Thawne at his prime, he hunts down Our Barry, and Wells helps him, fearful to lose Tess Morgan.

Imagine Other Barry and Wells hating Our Barry for, basically, letting himself be a pawn of Thawne his whole life.