The CW's "Crisis on Infinite Earths" features more DC cameos and references that one can count, and another one has just been revealed.In one of the first scenes of the crossover, Star Trek: The Next Generation's Wil Wheaton cameos as an apocalyptic protestor. However, if that wasn't enough, the sign he carries is also a reference to a past DC film.In a tweet posted by Jay Faerber, the Supergirl producer shared a photo of Wil Wheaton's cameo in "Crisis" next to a still from Superman II. Both Wheaton and the Superman II character are holding the same sign that reads: "PREPARE TO MEET THY DOOM. THE END OF THE WORLD IS NIGH."RELATED: Did Crisis Subtly Reveal What Happened to Earth-1 Bruce Wayne?

"Crisis on Infinite Earths" was a Superman fan's dream come true, with three different Supermen -- Tyler Hoechlin's Arrowverse version, Superman Returns' Brandon Routh and Smallville's Tom Welling -- making appearances. It also features two Lois Lane's -- Smallville's Erica Durance and the Arrowverse's Bitsie Tulloch.

"Crisis on Infinite Earths" will return after the winter hiatus. The crossover will conclude on Tuesday, Jan. 14 in Arrow at 8 p.m. ET/PT and in DC's Legends of Tomorrow at 9 p.m. ET/PT. The episodes of Supergirl, Batwoman and The Flash are now available to stream on The CW.

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