Right, but the whole point of Impulse isn't that he's a younger speedster, it's that he's ostensibly Bart Allan, decedent of Barry & Iris from the future.Actually, given the show's propensity for adapting stuff (like Pied Piper being a genius rather than a fruitloop, Atom Smasher and Dr. Light being villains, etc) I was kinda thinking they might go with Impulse as Wally's eventual codename, since Kid Flash does sound kinda dorky (and hell he's not actually that much younger than Barry in this series) - it also fits his "rush in without thinking" persona.
Wally West/Kid Flash is an entirely different character. He's also Iris's nephew not brother...but close enough.