For those Who think PK is similar to OMG
I think you have a "WRONG NUMBER"
1) PK was in preproduction before Oh My God was released. There were news at that time that Raju Hirani and Abhijat Joshi had to rewrite some of the story points. So if anyone think that PK was copied or inspired by OMG, they get their answer.
2) And what is wrong with doing another film on such an important topic. Do you watch Salman Khan movies? It is the same story over and over. All so called Masala movies. Even the actress (Sonakshi) and villains same for some cases. SRK do same act over and over. There are lot of Bollywood movies in the same formula and people go and watch them. Suddenly PK is attacked for the similarity of subject with OMG.
Actually PK is in a different level and the humour attached to the movie is mind blowing. Director and Writer Raju Hirani has been successful in conveying such a powerful and somewhat controversial topic in a light way, that people not only enjoy the movie but would take home a good message.