From the press release:
An all-new original animated film, "Batman: Soul Of The Dragon" does a deep dive into Elseworlds vibes by putting Batman in the midst of the swinging 1970s. Faced with a deadly menace from his past, and along with his mentor O-Sensei, Bruce Wayne must enlist the help of three former classmates – world-renowned martial artists Richard Dragon, Ben Turner and Lady Shiva – to battle the monsters of this world and beyond. The film is rated R for some violence.
The ensemble cast features a core group of actors playing martial arts students-turned-heroes in David Giuntoli (Grimm, A Million Little Things) as Bruce Wayne/Batman, Mark Dacascos (John Wick: Chapter 3 - Parabellum, Iron Chef America, Hawaii Five-0) as Richard Dragon, Kelly Hu (Arrow, X2: X-Men United) as Lady Shiva and Michael Jai White (Spawn, reprising his role from Arrow) as Ben Turner/Bronze Tiger. Their mentor O-Sensei is voiced by James Hong (Big Trouble in Little China, Blade Runner). Josh Keaton (Voltron: Legendary Defender; Green Lantern: The Animated Series) is featured as Jeffrey Burr, and additional voices are provided by veteran VO actors Grey Griffin, Chris Cox, Erica Luttrell, Robin Atkin Downes, Patrick Seitz, Jamie Chung and Eric Bauza.