This is more of a pitch than a wish:
The Flash: Earth One
The Flash actually witnesses the murder of his mother by his father. He’s distraught, understandably, and spends his entire life studying crime investigation to somehow overturn the image of the scene in his head, to somehow prove against all facts that his father didn’t do it. He doesn’t visit Henry in jail for fear of him simply telling Barry that he did murder Barry’s mother, Nora. On the day that he finally finds evidence that could be used to further an investigation into whether or not Henry Allen was guilty, he visits him to tell him the good news. It is there that Barry’s father admits that he was the one who killed Nora, and Barry snaps. He runs back to his office at CCPD and smashes his CSI tools, his life’s work now made useless. As he’s doing this, the fateful lightning bolt crashes through the window, hitting Barry in the chest as he is about to throw his forensic chemistry set on the ground. Nine weeks later. He wakes up in the Central City hospital. Everything around him seems to move in slow motion. We cut to a desolate future. A man is dressed in a yellow suit, but the panels never show anything more than a foot or a hand of it. The dialogue in the scene is between this man and another person (off-panel). They are talking about whether or not what they are attempting will work, and if it does, what that will mean for them. We cut back to the present. Barry Allen in this universe has basically become the Joker. He uses his newfound connection to the Speed Force to engineer as much chaos as possible. The government has designed a rival super-soldier in the form of Captain Leonard Snart, from whom we get the idea that he joined the army because of his abusive father, but it’s never explicitly stated.
The two are fighting. “Captain Cold and the Flash”, as they have been dubbed by news reporter Iris West. A bolt of red lightning strikes in the street and zooms off south, and the Flash seemingly disappears with it. Barry suddenly finds himself on a cliffside of a snowy mountain. He is punched by a yellow-gloved hand. Then kicked by a yellow-booted foot. He doesn’t understand; only he can move this fast. One more punch to the face and the Flash is sent straight backwards into the rock wall. Then the man in the yellow suit reveals who he is and why he came here. He is Eobard Thawn. He came to stop Barry before he can destroy the world and create the future that he came from. Barry doesn’t say anything, and the two begin to fight. They zip from location to location. Punch to Japan, kick to Africa, throw to Canada. The damage caused by this unbridled use of the Speed Force is catastrophic. Earthquakes, tsunamis, tornadoes. All over the world, cities are collapsing. People are dying. Finally, Thawn deals the killing blow to Allen. He gives a monologue about his live in the future, and how Barry had ruined the world for everyone. He runs around the world (Superman: The Movie-style) and zips forward in time to see the world the same as it was before. Unable to reason that he might have caused this, he goes back to the lab where he had designed his powers and his suit, and he sees the doctor that he had been talking with in the earlier scene. She asks why he didn’t succeed. He says that he did. She asks what could’ve gone wrong. He’s silent. He goes over to the console. The timeline is still one continuous loop. He hasn’t changed anything. He does a universal scan for any trace of the Flash, and he finds one on the timeline the doctor has designated Earth-0. He then says “What went wrong is, there’s always more Flashes”, and in the corner of the page we get a teaser for the next volume that says “The Flash of Two Worlds”.