JLU's Flash Becomes Kid Flash
Michael Rosenbaum who voices the Fastest Man Alive will guest-voice a Teen Titans speedster as well.
Michael Rosenbaum (Lex Luthor on Smallville, voice of The Flash on Justice League Unlimited) will also voice Kid Flash in an upcoming episode of Teen Titans on the Cartoon Network.
The character will appear in the "Lightspeed" episode, described as: "With Titans dispatched across the globe, members of the Hive Five figure they have it made. Unfortunately their city-wide crime spree is cut short when a new hero in town spoils the fun. Handing him over to the Brotherhood of Evil may score the Hive 
Five points, but actually catching this lightning-fast do-gooder is much harder than it seems."
The episode may debut in November.
The complete schedule for Cartoon Network shows can be found here.