In Cyperpunk 2077, Keanu will play Johnny Silverhand. PC Gamer has a piece on that details Johnny SIlverhand’s back story.
… he was a soldier in the Second Central American Conflict—you can see the dog tags from those days around Keanu’s neck in the trailer—a war in which the US experimented on its own troops with combat drugs and risky cybernetics. Johnny deserted, set himself up with a new identity, and moved to Night City.
There he started a band called Samurai with a fellow ex-soldier named Kerry Eurodyne…