Maybe Nora West-Allen could even join the series, assuming Team Flash wises up and sends her back to her own time to stop messing with the timeline!
Crossovers could still happen thanks to the other Arrow-verse shows dabbling (and more than dabbling) in time travel.
Continuing the flash-forwards into Season 8 and casting another major character could be signs that the folks behind the scenes are seriously considering launching a spinoff starring the next generation of Arrow heroes.