SPOILER WARNING: The following article contains minor spoilers for Batman #40, by Tom King, Joelle Jones, Jordie Bellaire and Clayton Cowles, on sale now.
Current Caped Crusader scribe Tom King won an Eisner Award for his short story in 2016's Batman Annual #1, in which he brought Ace the Bat-Hound back into current DC Comics continuity. Now, in Batman #40, King has brought yet another classic animal sidekick back into the fold: Wonder Woman's kangaroo, Jumpa.
While trapped in an alternate dimension where time works differently than it does on Earth, Bruce and Diana reminisce about their loved ones, whom they haven't seen in 31 years. For Bruce, it's the Bat-family, Catwoman and, of course, Ace. However, Diana leaves Bruce rather perplexed when she remarks, "I miss my kangaroo," adding that she doesn't usually talk about it. Nevertheless, before the exchange comes to a close, Diana has a chance to refer to Jumpa by name, effectively bringing the Themysciran marsupial back into main DC continuity for the first time since the Golden Age.
Created by William Moulton Marston and Harry G. Peter, Jumpa made her debut in Sensation Comics #6 in June 1942. Although she resembles an abnormally large kangaroo, Jumpa is actually a Themysciran creature known as a sky kanga and is capable of not only leaping extraordinary distances but even taking flight.
Despite her absence from main continuity, Jumpa has been a staple of the DC Super-Pets! shorts on Cartoon Network, as well as the similarly titled children's books published by Capstone Kids.
Of course, since we don't actually see Jumpa in this issue, the likelihood that it's merely a one-off reference is fairly high. Nevertheless, it's still a fun nod by King to Wonder Woman's long, storied and, at times, bizarre DC Comics history.