https://bulbagarden.net/threads/teen-titans-trouble-in-tokyo-to-debut-sept-15-on-cn.14043/
Teen Titans: Trouble in Tokyo to Debut Sept. 15 on CN | Bulbagarden
Original source (scroll down for screenshots) Doesn't sound too special. Just seems like a random episode expanded to fill the timeslot of a movie...
teen titans trouble in tokyo