ARROW/FLASH Crossover Trailer - 'Heroes Join Forces'

Still from 'Heroes Join Forces' trailer
Credit: The CW

The CW has debuted a trailer for the upcoming Arrow/The Flash crossover event titled "Heroes Join Forces." Previously described as a lead-in to DC's Legends of Tomorrow, the crossover is scheduled for the first week of December.

Take a look:

The two-part crossover begins in the December 1 episode of The Flash and concludes in the following day's Arrow.

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