Insiders say that Katrina Kaif will appear in a film, to be directed by Homi Adjania - the one who directed Cocktail (which too was Saif's home production venture). Saif Ali Khan is eyeing key actresses of Bollywood to feature in his movies, Katrina by far, seems to be the best bet.
Also, there was a buzz that Katrina might not feature in Bang Bang, as she was too glamorous to fit in the role of Cameron Diaz, from the Hollywood flick Knight And Day. And another infamous reason of keeping only a periodic term, a term that did not lasted well with Mr Malhotra during Agneepath for the song Chikni Chameli.
Whatever it may be, but we can't tell you where the certainty lies in all these rumor. What's your say?