The Arrowverse crossover "Crisis On Infinite Earths" is the biggest event in the history of The CW's DCTV series, and the pressure may be getting to Stephen Amell.The Arrow star shared a photo on his Twitter account homaging Tony Stark's heroic sacrifice in the climactic battle to Avengers: Endgame. The Photoshop job replaces Tony Stark's face with Amell's, right when Iron Man is about to snap his fingers while wearing his Stark Gauntlet.RELATED: Crisis on Infinite Earths Photo Reveals An Arrow Mainstay as Harbinger"There are no easy days on the crossover," the caption reads. Amell's face is bruised and battered, matching the bloody behind-the-scenes photo he shared earlier this week.

In the previous Arrowverse crossover, "Elseworlds," Oliver Queen saved the lives of Barry Allen and Kara Zor-El by making a deal with the Monitor. Now, it's believed that Green Arrow will make the ultimate sacrifice in "Crisis on Infinite Earths." The eighth and final season of Arrow will conclude with two episodes following the conclusion of the crossover event.

"Crisis on Infinite Earths" begins Sunday, Dec. 8 at 8 p.m. ET/PT on Supergirl, then continues in Batwoman on Monday, Dec. 9 at 8 p.m. ET/PT and in The Flash on Tuesday, Dec. 10 at 8 p.m. ET/PT. 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.

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