Am I the only one who has trouble picturing how this show could really work? Granted, I haven't seen any DC animated stuff, but if your hero can move so fast he can kick everyone's ass before they even know he's in the room, what danger can he possibly face?
Also, if the tone is considerably more lighthearted, maybe a half-hour format would be best? I doubt they'd do it, because hourlong shows are no doubt much cheaper on a per minute basis, but the live action The Tick
had some great light-hearted half-house superhero stories.