Cisco made a board with a drawing of the world map which shows important locations from the DC Universe Including: *United States: Star City, National City, Gotham City, Central City, Metropolis, Freeland *Central America: San Monte, Santa Prisca *South America: Corto Maltese *Europe: Markovia, Kasnia *Asia: Qurac, Nanda Parbat, Toyko *Africa: Zambesi, Tunisia, Gorilla City *Pacific Ocean: Kooey Kooey Kooey Island, Dinosaur Island, Lian Yu *The Arctic: Fortress of Solitude
Cisco made a timeline of Earth-Prime which went over important events and hero debuts including: *2000: The Murder of Nora Allen *2003: Kara's pod lands on Earth *2005: J'onn J'onzz becomes Hank Henshaw *2007: Oliver Queen is stranded on Lian Yu *2008: Slade Wilson is injected by Mirakuru *2009: Hong Kong is hit by the Alpha-Omega virus, Black Lightning retires from vigilantism. *2012: The Hood debuts in Starling City *2013: The Undertaking occurs *2014: The Particle Accelerator explodes. Slade invades Starling City with his Mirakuru Army. Barry wakes up from his coma and becomes The Flash. John Diggle Jr. and Sara Diggle is born. *2015: Bruce Wayne leaves Gotham City. Supergirl debuts in National City. Rip Hunter recruits the Legends *2016: Flash and Supergirl team up. Zoom invades Central City. The Dominators invade Central City. The Ray debuts *2017 Barry and Iris's wedding is interrupted by time travelling nazi clones. *2018: Batwoman debuts. Black Lightning returns. Thunder debuts. President Mardsin is exposed as an alien *2019: The Crisis begins *2020: The heroes return and defeat the Anti-Monitor.
It's indicated that Earth-Prime's events aren't necessarily the same as Earth-1's and that there have been more changes to the timeline as evidenced by the board with a timeline of events detailing Earth Prime events such as Barry and Iris' wedding was interrupted by time-travelling Nazis instead of Nazis from another Earth.
Similar to his Earth-90 counterpart, The Flash (1990), Barry Allen receives a gift of the mask of his vigilante mentor, Desmond Powell and Oliver Queen respectively.
Cisco has made a "Who's Who" binder of those whose status upon Earth-Prime's formation are unknown. The following appear in it: *Abra Kadabra *Amunet Black *Block *Bug-Eyed Bandit *The Dominators *Frankie Kane and her Magenta side *Girder *Grodd *Hotness *Kimiyo Hoshi "King Shark *Mist *Trickster *Weather Witch. "Who's Who" was a comic series published by DC in the 1980s featuring dossier-style entries for virtually every character in the DC Universe.