Warning: This story contains major spoilers from the Arrow-Flash-Supergirl-Legends of Tomorrow crossover. Read at your own risk!
During The CW’s four-way crossover, the heroes of The Flash, Arrow, Supergirl, and DC’s Legends of Tomorrow assembled to stop the Dominators from quashing the unpredictable threat of metahumans.
It turns out, the Dominators and Earth had a decades-long truce after the aliens arrived in the ’50s to determine the threat of enhanced individuals — a treaty that Barry Allen (Grant Gustin) inadvertently broke by creating Flashpoint and tinkering with time.
Though the storyline hues somewhat close to what happened in DC Comics’ Invasion crossover event, which debuted in late 1988, the Arrowverse certainly took some liberties. Here’s a few of the ways the stories were different:
Arrow boss on that Artemis betrayal
The best nods to the past in Arrow’s 100th episode
Supergirl boss on what’s next after those winter finale reveals
Arrow EP reflects on 100 episodes
EW’s cover story on the four-way crossover
What was cut from the Arrowverse crossover?
The Dominators will return on Supergirl — here’s why that’s scary
The Flash: More Flashpoint repercussions to come, but…
Supergirl will return in 2017, while the winter finales of The Flash, Arrow, and DC’s Legends of Tomorrow air Tuesday, Wednesday, and Thursday, respectively, at 8 p.m. ET on The CW.