Anti-Monitor Crisis

The Crisis of 2024 is a future event that will happen on the night of April 25, 2024. Eobard Thawne/Reverse-Flash traveled there and battle against Barry Allen/The Flash, Oliver Queen/Green Arrow, Kendra Saunders/Hawkgirl and Ray Palmer/Atom for unknown reasons, presumably because he was trying to kill Barry. This event will happen in all possible timelines, including Eobard's timeline of origin and Pre and Post-Flashpoint timelines. The only timeline that this event will not happen is theFlashpoint timeline. It is in this event that Flash and the Reverse Flash will return to March 18, 2000 to fight in the Allen house.

Pre-Crisis
After several encounters, Eobard Thawne/Reverse-Flash learned the Flash's real name, in which is Bartholomew Henry Allen, better known as Barry Allen. Eobard began to study about Barry and learning about his life, including the life of his parents, most notably Nora Allen,  and decided the best way to defeat his enemy was to murder Barry as a child on the night of March 18, 2000, but not before having his latest encounter with the Flash and traveled to the night of April 25, 2024.

The Crisis
After Reverse-Flash arrived on 2024, Eobard got attention from Flash and its allies, in which are Oliver Queen/Green Arrow, Kendra Saunders/Hawkgirl and Ray Palmer/Atom. They started fighting on the streets of Central City causing the most destruction the city had ever seen. The fight also somehow caused the sky to turn a deep crimson color. Their fight caused several trucks to start leaking their contents onto the streets, and caused power outages spread over 20 blocks throughout the city. The speedsters then started battling over two overturned tanker trucks, and the lightning emitted from them caused the oil from one of them to ignite. While sounded by smoke both speedsters had a very heated conversation on an unknown matter, then the two sped off leaving Green Arrow, Atom, and Hawkgirl behind. The two then continued their fight up and down an unknown avenue before Flash vanished without a trace. However, unknown to everyone, The Flash and Reverse-Flash traveled back in time to March 18, 2000, with the Flash chasing Reverse-Flash. The two fought inside the Allen house around Nora Allen, each landing solid hits on each other but their skills were fairly equal, but eventually the future flash was the significant better compared to the Reverse-flash. When the 11 year old Barry comes into the room, Nora is in the center of the room surrounded by streaks of yellow and red lightning and gets a brief glimpse of Reverse-Flash's face. As Reverse-Flash moved in for the kill Flash intervened and transported his younger self to safety 20 blocks away, much to Reverse-Flash's outrage. However Reverse-Flash quickly theorized another way to achieve his goal: to kill Nora and frame Henry Allen for the crime in the hopes that such a tragedy would traumatize Barry enough so he would not achieve his destiny, and he'd be free to return to a future without the Flash, so Reverse-Flash grabbed a kitchen knife and stabbed Nora in the stomach and fled the scene to return to his own time which he hoped would now be one without The Flash.

Post-Crisis
Several days after the Flash vanished in the Crisis, the Central City Citizen was published, and was written by Iris West-Allen (Original, Pre and Post-Flashpoint timeline after Barry saved Iris from Savitar); Julie Greer (Post-Flashpoint timeline in which Savitar kill Iris).