2. Wally West
Wally West was seemingly wiped from history as a result of DC’s “The New 52” reboot, but fans of the longest serving Flash (he took over when Barry Allen died) have not stopped pestering DC about bringing him back! When he was first introduced, Wally was Iris West’s young nephew and gained his powers in the same way as Barry. This led to him becoming Kid Flash and a member of the Teen Titans (another series that The CW are apparently working on), so this could be a smart way to introduce this character at some point to live action. Just as Barry made his debut on Arrow, the same could be done here, although whether that would satisfy fans of the older version of the character is another matter entirely!