I've been seeing a lot of confusion in regards to the release date in various regions. Some regions have seen delays while others have not which is causing some people to mix up release dates. Hopefully this post will clear up any confusion on the matter.
North America: Originally scheduled for the 15th, and has not been delayed. Still coming out on September 15th. Source (make sure to read it carefully, hehe)
Europe: Originally scheduled for the 25th, it recently received a 2 week delay. It is now coming out October 9th. Source
Australia: Originally scheduled for the 16th, it recently received a 2 week delay. It is now coming out September 30th. Source