Supergirl, Arrow, The Flash, Legends of Tomorrow Crossover: Heroes vs Aliens! event is almost here. It's all starting from,
Supergirl – Medusa (Monday, Nov. 28) :
The epic superhero crossover kicks off when the Flash, Barry and Cisco seek help of our sweet alien Supergirl, Kara with an alien invasion on their Earth One.
The Flash - Invasion! (Tuesday, Nov. 29) :
When aliens attack Central City, Barry asks the Green Arrow, Oliver for help in stop the attack. Realizing the battle against the aliens is much bigger than they thought, they track down the Legends of Tomorrow team and create a breach to super earth to bring the Supergirl.
Arrow - Invasion! (Wednesday, Nov. 30) :
Oliver wakes up to a life where he never got to be the Green Arrow and his parents are still alive. Laurel is also alive and his loving fiancé. But he is starting to question this new reality. Meanwhile, Felicity and the new recruits of the team Arrow, take on a new threat with help from Barry and Supergirl, Kara.
DC's Legends of Tomorrow - Invasion! (Thursday, Dec. 1) :
After learning the alien attackers plan for the Earth One, the team Legends of Tomorrow (White Canary, Vixen, Atom, Commander Steel, Firestorm, Heat Wave) must work together with The Flash, Supergirl and Green Arrow and their teams) to kill the alien attackers.
That is how the Supergirl, Arrow, The Flash, Legends of Tomorrow Crossover happens and our super heroes : Green Arrow, Spartan, Wild Dog, Artemis, Ragman, Mr. Terrific, Speedy, Overwatch, Supergirl, Flash, Vibe, Dr. Wells, possibly Killer Frost and Kid Flash, Iris and Detective West, Atom, Firestorm, White Canary, Heatwave, Vixen, Steel save our world.
-Credit: The CW-