The Rumors purport that there will be no major changes in camera for upcoming iPhone 6s when compared to 4S. The new shooter will carry a 12MP rear unit and will record 2160p video. For Selfie camera, you may get a 5MP sensor. The new camera will enable selfies at 720p and an improved video recording overall.
The Phone will be unveiled on September 9 so keep your fingers crossed for the base storage.