The early plot description for the episode revealed that the fiasco would start when Constantine broke the #1 rule and changed the past, despite all the grief he gave the Legends for breaking time and unleashing magical creatures on Earth.
The Legends are going to be busy fixing what they broke during the big “Elseworlds” crossover.
Legends of Tomorrow is bonkers on a weekly basis, but the craziness may be at an all-time high in next week’s episode, called “Legends of To-Meow-Meow.”
DC's Legends of Tomorrow 4x08 Promo "Legends of To-Meow-Meow" (HD) Season 4 Episode 8 Promo