Batman: The Animated Series' Bruce Timm is returning to DC for Batman: Soul of the Dragon, an animated film from Warner Bros. Animation, DC and Warner Bros. Home Entertainment that takes the Dark Knight of Gotham City on a trip to the 1970s.
According to THR, Soul of the Dragon is not based on any previous source material. Instead, it's an original story
"[that] sees Bruce Wayne face a deadly menace from his past, with the help of three former classmates: world-renowned martial artists Richard Dragon, Ben Turner and Lady Shiva."
Soul of the Dragon is executive produced by Timm and directed and produced by DC animation veteran Sam Liu from a script by Mortal Kombat Legends: Scorpion’s Revenge writer Jeremy Adams.
Directed by Sam Liu and executive produced by Bruce Timm, Batman: Soul of the Dragon stars David Giuntoli as Bruce Wayne/Batman, Mark Dacascos as Richard Dragon, Kelly Hu as Lady Shiva, Michael Jai White as Ben Turner/Bronze Tiger, James Hong as O-Sensei and Josh Keaton as Jeffrey Burr. The film arrives in 2021.