The first time we see Barry as a child we also see the fight between future versions of The Flash and The Reverse Flash.
We know that The Reverse Flash is unable to return to the Future after this fight but what happens to The Flash after this?
Did he (The Flash) "simply" return to the future? I can't find reference to it, even in the later episode (Fast Enough)
Just to clarify we find out later that there are 4 versions of Barry in that time frame that. Child Barry. Future Barry, who is fighting the reverse flash, but leaves to save child Barry. We then have two versions of Barry from the timeline we are viewing. 1 From episode 1x23 (Fast Enough) and 1 From episode 2x23 (The Race of His Life). I'm asking about future Barry.