As Koi Mil Gaya (2003) celebrated twenty years of its release, director Rakesh Roshan and his son, actor Hrithik Roshan shared details on Krrish 4. At an event organised by Pinkvilla, Roshan said, “I won’t make Krrish 4 till I am not satisfied from inside. We have got the script ready, but we keep on improvising. I still feel there is some scope of improvement. We can’t make films on budgets as high as Hollywood and hence, our content has to be strong and new in this world of superheroes. We have got a great story and we are now just retouching it.”
The filmmaker also said that Krrish 4’'s script is so magical that it will grab the audience’s attention in the first 15 minutes. Roshan said, “Nothing can stop a film from creating magic if the script is good. I am sure, our script will catch the audience's attention in the first 15 minutes. The Krrish 4 script is magical.”
Hrithik added to his father’s comments and said, “I don’t think dad is driven by the glory (of making a franchise). When you talk of Krrish 4, you don’t have the freedom to write whatever you want. You have to navigate the budget and that is a very big driving force in the kind of scenes we chose – the action sequences too (have to be designed keeping the budgets in mind). It’s difficult.”
Hrithik has starred in all the films in this sci-fi universe that have been directed by Roshan. In Koi Mil Gaya he played Rohit, a mentally challenged boy who is given special powers by a friendly alien Jadoo. In Krrish (2006) and Krrish 3 (2013), Hrithik played Rohit’s son Krrish, who has his father’s powers and is faced with dangerous evil forces.