A Rambo prequel is officially in development. The iconic action movie franchise, which stars Sylvester Stallone in the role of John Rambo, kicked off in 1982 with the smash hit First Blood, which followed the Vietnam veteran character being targeted by Washington law enforcement, unleashing memories of his time as a prisoner of war that caused him to react violently to the situation. The first movie grossed $160.3 million against a reported budget of $15 million, spawning a multimedia franchise that now includes five Rambo movies, the most recent of which was 2019's Last Blood.