"Root of All Evil" is set in the animated universe, and I did have a couple of things mentioned to me that I thought I'd clear up.
First, Iris's name: Iris West II. Notably, the original Iris Allen nee West is never mentioned in the DCAU (save for New Frontier, which isn't part of the series continuity) and for all intents and purposes, no one is even sure if Barry Allen existed in that continuity. While watching the episode "Flash and Substance," I noticed that you can see Jay Garrick's hat in one scene... and in another, Wally's famous Kid Flash uniform. As a result, the DCAU I deal with features Wally having become a speedster while doing work-study with his aunt Iris's husband, Barry Allen, who was the Flash before him. He thus became Kid Flash at 17, and the Flash at roughly 19. Barry did, in fact, run himself to death, and Wally's quotes (whenever he says "Grammy Flash always says...") are actually little parables and phrases Iris passed to him. Wally's profession as a forensic scientist instead of a police mechanic is explained by him trying to follow in Barry's footsteps. Thus, his daughter Iris (Jai, her twin brother, I think may've been named after Jay Garrick, but that's a story for another day) was named after his beloved aunt.
Lady Flash as the first female Flash. In the comics, that was Jessie Quick. In the DCAU, the Quicks didn't exist. Iris, who spent some time working with her father as Kid Flash, thus becomes the first girl in this fan's DCAU continuity to take on the mantle.
Rex's wings. In general, it's assumed he does not have wings. The ones seen in animation are just wing-guards created by Nth Metal. In this continuity, since it's painfully fun to write people with big feathery wings, the Nth Metal armor really is a guard to protect his wings, and his wings - because of his half human heritage - are ink black, unlike his mother's, which are gray.
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