Teen Titans Toon Magenta

Even though she's now a Flash villian, Magenta (aka Frances Kane) got her debut in the Teen Titans comic book. They could have an episode where the Titans have to infiltrate a private school (where you get to see your favorite Titan in a school uniform) where some strange disruptions have been going on. This would eventually lead to the tormented (by her domineering, fanatical mother and fellow schoolmates) Frances who has now taken over the school with her metal-controlling powers. Now throw in Slade manipulating her the whole time, preparing her to be his new apprentice.