In the episode, "The Once and Future Thing: Weird Western Tales (1)", Batman, Wonder Woman, and Green Lantern chase a time-travelling thief (Chrono) into the past and team up with some local "superheroes" of the era to deal with an outlaw who has used the thief's futuristic technology to take over an Old West town. (ANd get back the Chrono suit.)
One of these local heros, is EL DIABLO, who very much resembles ZORRO. With the black cape, whip, and black stallion. And I was wondering, if that really is the legendary Zorro?