John Abraham?s upcoming romantic comedy, Welcome Back which is a sequel to the hit 2009 film, Welcome, has been in the news for its apparent box office clash with Salman Khan?s production venture, Hero starring debutants Sooraj Pancholi and Athiya Shetty. More than the clash, what attracted attention was Salman?s tweet that said, ?Back off? HERO coming on 4th September,? which sounded very much like a personal threat to John. Well, the makers made it clear yesterday at the trailer launch of the film that they weren?t scared of threats and that the release date would not be changed for anyone.