Launching on August 24 as part of title update 5.5, the crossover will introduce assassin Darcy as a new playable character for season pass owners.
“Play with the futuristic assassin in the main game or online and bring her signature hidden blade in the ultimate stealth-based Watch Dogs: Legion experience,” reads the blurb accompanying the trailer.
Next week’s update will also introduce new content for all players in the form of two story missions as well as world missions, which will be available free of charge.
It will include the release of new zombies survival mode Watch Dogs: Legion of the Dead too.
“In a London filled with zombies, Albion soldiers and Clan Kelley enforcers are hoarding valuable supplies that you must get your hands on to ensure the survival of your crew,” Ubisoft says.
“No matter if you are going in solo, with friends or up to 3 other players via public matchmaking, you will have to be smart with your resources, your tactics and plan ahead to gather supplies, find power-ups and extract from London alive.”
Watch Dogs: Legion season pass owners previously gained access to a story expansion called Bloodline, which starred Aiden Pearce from the original Watch Dogs and Wrench from Watch Dogs 2, plus new character Mina, a transhuman with the power of mind control.