Salman Khan will be police, not thief in Dhoom 4

In Salman Khan's Dhoom 4 reloaded, Ranveer Singh is Final. However, official announcement is to be made, but news says that Salman Khan is villain of Dhoom series and Hero is Ranveer Singh. Now if we talk about twist in story, if to believe the source, then in Dhoom 4, Salman Khan is not a theif, he is a police, but all policemen are not good, So Salman Khan is not a good policeman. Means bad boy. Ranveer Singh is a good police officer, now this time who will win like always bad boy or Good Boy. Although Salman Khan has never played Negative role, So seeing him in a negative role will be interesting.