It would be definately Kabhi Alvidha Na kehna... It would be 10 times worst than worst film.. worst among the worst.. Karan Johar has thought himself that whatever he does will be accepted by audience.. it was a utter waste of lovely star cast.. hope he doesnt make that mistake in his next venture..
"DON" ofcourse was the worst of all. As, no-one can take on Amitabh Bachchan and that too on his classics. This should be clearly understood by one and all, especially Shahrukh Khan. He thinks he can do anything and get away. If he is King, then Amitabh is King of Kings (Shahenshah)
Then there were, "Zindagi Rocks", "China Town", "Jaaneman" and "KKrish".