For Shahrukh Khan it is a 'no-no' for negative role in Abbas-Mastan's Race 3. The director duo apparently approached SRK with the offer and the narration which he denied donning it.
Aamir Khan's role in Dhoom 3 had a subtle negativity which clicked, the director duo convinced Shahrukh to do the same kinda role for Race 3.
Buzz is that King Khan feels that his audience would not accept him in such a dark role for now and denied doing that role.
One cannot forget the dark shades of character Shahrukh portrayed in Baazigar, Darr, Anjaam and more recently in Don and it's sequel Don 2. But he strongly refused to do a negative role in Race 3 even after strong persuasion from the directors.
Shahrukh Khan will be seen next in Farah Khan's Happy New Year. He's also signed in for director Rahul Dholakia's Raees. Aditya Chopra's film is also there in his kitty.
But who wouldn't want Shahrukh Khan to be seen in a bad-ass, negative, dark role contrary to SRK's gut feeling?