India, March 29 -- It's official - Krrish 4 is finally happening. After years of speculation, the fourth instalment of the superhero franchise is in the works, and this time, Hrithik Roshan is stepping behind the camera for his directorial debut. The Krrish films, a spin-off of the 2003 hit Koi. Mil Gaya, were previously helmed by his father, filmmaker Rakesh Roshan....