Initally Farhan Akthar wanted Don of all three generations to be part of the film.Amitabh Bachchan from original film in (1978).Shahrukh Khan from its remake in Don (2006) and Don 2 The chase Beings (2011).And Ranveer Singh as the new Don.But Shahrukh Khan decided not to be part of the film.Hence the idea was dropped.
Ranveer Singh replaces Shahrukh Khan in the series.
Although the title and teaser suggested the film would be the conclusion of Bollywood's blockbuster DON saga, dating back to Amitabh Bachchan's original classic in 1978, there is also speculation amongst analysts that Ranveer Singh might be taking up the mantle of the titular international criminal mastermind from this movie onwards.