The buzz is that Shah Rukh is not happy with his role getting extended so much so, that he didn't want to complete shooting for the film.
However, producer Vivek Vaswani has rubbished these reports and informed that they have not added or subtracted any scenes with Shah Rukh.
Whatever was narrated to him has been filmed. He has 17 scenes and three songs. One of the music videos is yet to be shot with the entire cast. Since Shah Rukh is doing Dulha Mil Gaya as a favor for a friend, he is being credited as a guest appearance.
Vaswani also thinks that getting credited, as a guest appearance does not depend on the length of the role. He gives the example of Sunny Deol in Damini.
Similarly, he feels that while Shah Rukh is not part of the main cast, his role is equally powerful as that of the others. SRK will be seen promoting the film along with the other cast members.