Filmmaker Rohit Dhawan has reportedly replaced Siddharth Anand as the director of Tiger Shroff-starrer 'Rambo', which is the Hindi remake of Sylvester Stallone's action movie by the same name. Reportedly, Rohit has already started working on the script with his team of writers. Siddharth will reportedly be involved in the film's creative development and will be credited for it too.