Fans of The Flash Season 3, Arrow and other CW shows brace yourselves – an epic crossover is about to happen very soon.

Arrow lead star Stephen Amell has teased the crossover in a photo from the set. The photo showed booths of several DC heroes. Aside from Arrow’s booths, The Flash’s (Grant Gustin) red boots were also in the image. White Canary’s (Caity Lotz) kicks, Ray Palmer’s (Brandon Routh) Atom suit and another pair of red boots that could belong to Supergirl (Melissa Benoist ) were featured in the photo. Amell captioned the picture with “Coming soon.”

Supergirl lead star Benoist told Entertainment Tonight in June that the show is moving to CW from CBS. Currently, CW has DC’s Arrow, The Flash, Legends of Tomorrow, and Supergirl in its lineup.

During the San Diego Comic Con 2016, Amell was asked what viewers could expect in the upcoming Arrow Season 5. The actor pointed out the formation of a new team that will effect change.

According to Entertainment Weekly, the upcoming epic crossover is set to happen in November. DC TV producer Greg Berlanti has said all of the CW’s DC heroes will join forces in a crossover to take down one common threat.

Arrow and The Flash have done several crossovers in the past. The Scarlet Speeder also appeared in Supergirl last spring.  Amell has been confirmed to appear in first episode of Legends of Tomorrow’s Season 2.

All four DC shows return on CW this fall. The Flash season 3 premieres on Oct. 4, while Arrow Season 5 will debut on Oct. 5. Supergirl will have its debut on CW on Oct. 10, and finally Legends of Tomorrow returns on Oct. 13.

Meanwhile, another CW show that may crossover in any on the DC show in the network is Supernatural.

Supernatural stars Jared Padalecki and Jensen Ackles shared a video of them on the set of The Flash Season 3 recently. The two were seen eating and sleeping despite explicit signage on The Flash set warning them not to.

Are the Winchester brothers going to sign up in the epic CW crossover? Or at least in The Flash Season 3 crossover?