RAMBO is heading to Bulgaria for a fifth film, according to internet reports. Sylvester Stallone's action man will return for one more adventure following the success of the actor/director's recent Rambo. And Moviehole.net reports the streets of Bulgaria will double for Rambo's native Arizona in what is likely to be the final installment of the franchise. Bulgaria has reportedly been chosen because it's much cheaper to film in Eastern Europe than it is in Arizona itself. Stallone's iconic soldier was seen returning home to visit his father in Arizona at the climax of the most recent Rambo movie.