SPOILER WARNING: This article contains major spoilers for “Infantino Street,” the latest episode of The Flash.

The penultimate episode of The Flash's third season already contained a major Easter egg in its title, "Infantino Street," which pays homage to longtime Flash artist and staple of the Silver Age of comics Carmine Infantino. However, eagle-eyed viewers noticed another, potentially massive Easter egg, this time teasing longtime Wonder Woman villain Cheetah.

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With the return of fan-favorite foes King Shark and Captain Cold, the episode already packed a villainous punch. As the pair of unlikely allies walked through the prison hallway, they passed one cell containing Grodd, which led to Barry explaining to Snart who, exactly, the prisoner is. While the pair's banter may have been enough to distract some viewers, others noticed another name on a different holding cell in the A.R.G.U.S. facility.

While there have been several incarnations of the Cheetah in the comics, the one most fans are familiar with is British archaeologist Barbara Ann Minerva. Created by Len Wein and George Pérez, this iteration of the Cheetah first appeared August 1987's Wonder Woman #7 after the series was rebooted following Crisis on Infinite Earths. Minerva would go on to serve as a thorn in the side of the Amazon Princess for years, and the character even plays a significant role in the current Wonder Woman ongoing series by Greg Rucka, Liam Sharp, and Bilquis Evely.

Fans of The CW's ever-expanding Arrowverse have grown accustomed to spotting blink-and-you'll-miss-it Easter eggs such as this that nod towards the greater DC Universe's massive roster of heroes and villains. The Season 4 premiere  of Arrow teased Green Lantern when a brown pilot's jacket with the name "Jordan" sewn onto it appeared in passing, and Hal was hinted at again in The Flash's Season 2 episode "Welcome to Earth-2," when his name, along with Bruce and Diana (presumably Bruce Wayne and Diana Prince) showed up on the speed dial of Barry's Earth-2 doppelganger, while another Arrow episode featured Harley Quinn's voice, though the iconic villain never materialized in the flesh.

Obviously, we've yet to see Green Lantern, Batman, or Wonder Woman show up on The CW, so whether or not this tease means that we'll actually see Cheetah appear in the Arrowverse is anyone's guess. In any case, it's still a fun nod to Wonder Woman ahead of her big-screen solo debut this June.

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Airing Tuesday at 8 p.m. ET/PT on The CW, The Flash stars Grant Gustin, Candice Patton, Danielle Panabaker, Carlos Valdes, Tom Cavanagh, Jesse L. Martin and Keiynan Lonsdale.