After actress Kareena Kapoor Khan walked out of Karan Johar's 'Shuddhi' following the delay, the film's lead actor Hrithik Roshan too walked out of the film due to date issues. Katrina Kaif, Hrithik Roshan get busy with 'Bang Bang'... Ranbir-Deepika to replace Hrithik-Kareena in 'Shuddhi'?