Earlier this month, "Arrow" signed off for its winter hiatus with a surprising reveal -- one so surprising it warrants a spoiler warning right here. At the end of the episode, titled "What We Leave Behind," Oliver Queen (Stephen Amell) steps into the Arrowcave and finds a surprising visitor in there waiting for him.

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That visitor was Laurel Lance (Katie Cassidy), the vigilante known as Black Canary. The surprising part? She's dead -- or at least everyone thought she was dead. The reveal has kept fans guessing all month, and will continue to keep them guessing through almost all of January as well. To hold fans over, the CW has released a promo for the January 25th return episode -- and it teases there's more to Laurel's return than meets the eye.

Yep, there's something not quite right here, as Queen says that this new person is "not our Laurel" as Cassidy's character stalks towards them and says it's "about time somebody figured it out." Could this be the villainous Earth-2 version of Laurel Lance that Cassidy previously played on "The Flash"? Or could that exchange be part of a nightmare sequence? Fans will have to wait a month to find out for sure!

Starring Stephen Amell as the Emerald Archer, "Arrow" airs Wednesdays at 8 pm ET/PT on The CW. The series also stars Emily Bett Rickards, David Ramsey, John Barrowman, Willa Holland and more. "Arrow's" fifth season returns to the CW on January 25.