The CW Network revealed posters for "Supergirl," "The Flash," "The Legends of Tomorrow" and "Green Arrow" for their crossover event beginning on Nov. 28. The four-part crossover starts in the final moments of Supergirl then continues in the other series since Supergirl is shown every Mondays, The Flash every Tuesdays, Green Arrow every Wednesdays and Legends of Tomorrow every Thursdays.

In the background of the Supergirl poster, the alien group Dominators appear in the background so it looks like they are going to be the villains in the crossover. However, instead of building their own race, they will be mind-controlling the aliens that join them which means there will be a point where the superheroes will end up taking on one another which would be a comic book fan's dream come true. Who wouldn't want to see a winner come out between a fight between the Flash and the Green Arrow?

The episode description of Supergirl sees Barry and Cisco seek the help of Supergirl in battling an alien invasion that is taking over the planet. For the episode of The Flash, the Dominators, which are revealed to be the aliens, unleash an attack unto Central City which brings the Legends of Tomorrow and Team Arrow into the scene. The final confrontation between all the heroes and villains involved in this altercation takes place in the Legends of Tomorrow episode so it is one episode that should not be missed.

One surprise seen in the four posters is the Hall of Justice, the headquarters of the Justice League. It could be nothing more than just the background for the four posters or it could be used to its full extent. There are a lot of other characters spotted in the poster like Felicity, Firestorm, The Atom, Martian Manhunter, Cisco and Diggle.

Tags The flash, Supergirl