DC Universe: Rebirth #1

Synopsis

Wally West, who has not been seen in the new 52 Universe, finds himself aged back to a youthful Kid Flash existing outside of the normal timeline. He appears to Batman hoping that Bruce will remember him and help him, but gets pulled back into the Speed Force before that happens. Wally recalls how the New 52 Universe was formed as the result of undoing the Flashpoint universe, but only Wally is aware that some outside force manipulated events so that some things were different in the New 52 Universe than in the pre-Flashpoint universe, including stealing 10 years from the heroes lives.