I’m of the belief that The Flash may very well start down that narrative path as early as the Season 5 premiere.
It’s obviously not confirmed, but the timing works.
Since Danielle Nicolet is now a series regular, we’ll be seeing her more than ever on The Flash, and you can bet that the show is going to delve into how her temporary powers came to be, and possibly how her and Joe’s new offspring is connected to those powers.
After all, the cast and crew were only working on the second or third episode when Comic-Con hit, and they don’t get scripts sent far in advance of filming, so it’s almost a certainty that they’d already filmed one scene or another where characters start questioning what Cecile’s deal was, and where he abilities came from.