This issue has variants.
Cover is an homage to the cover of The Flash (1959 series) #123 by Carmine Infantino and Murphy Anderson. Carmine Di Giandomenico signed the cover "Carmine to Carmine".
The confusing lineage of the second Wally West is clarified. In The Flash 2011 series, the second Wally referred to Daniel West, the Reverse Flash, as uncle Daniel. In DC Universe: Rebirth #1 (2016), the original Wally states that the second Wally is a cousin that he never met who is the son of Daniel West. Presumably, this was a re-set as part of Rebirth. This seemed to be contradicted in issue #8 as well as Teen Titans: Rebirth #1 (2016), where the second Wally again referred to Daniel as his uncle. However, in this issue, Barry tells the second Wally that Daniel is in fact his father, even though Wally had erroneously believed him to be his uncle.
Barry and the original Wally do not tell the second Wally who the original Wally really is, Barry refers to him as another Flash whom he had previously trained. Barry has also not yet revealed his own identity to the second Wally. The original Wally does not reveal his existence to Iris, he wants to wait until they discover who is behind their missing years.
Barry has one final vision of an object that he does not recognize, but it appears to be the helmet of Jay Garrick, who has not been seen in the DC Universe since the New 52 began.