52 Multiverse

History
In 2011, the Flashpoint event happened altering reality.

“Well, he only partially created it. It happened when, during Flashpoint, Barry went back to allow Eobard Thawne to kill his mother. During that brief moment of a tear in the fabric of time and space, it is believed that Doctor Manhattan of the Watchmen tampered with the timeline and stole 10 years away from everyone barring a handful of people (original Wally West had been trapped in the Speed Force just before Barry created Flashpoint, thus being one of the few to have memories of what happened prior).”

—Chase Bivens