I believe there are similar "rumors" pretty much every 'S' year that haven't gone anywhere. That certainly can change, but aside from the same old guessing every time there doesn't appear to be anything new to it to make it any more likely than just a simple possibility that has always been there.Some sites have suggested the next iPhone will be called iPhone 7 and not the 6s because of the amount of updates that will warrant the 7 number over 6s, but that is just talk. Do a google search, and you all can read up on this rumor.
Here are three examples
http://www.theweek.co.uk/iphone-7/62138/iphone-7-significant-changes-for-2015-handset
http://www.v3.co.uk/v3-uk/news/2411938/iphone-7-seven-of-the-best-rumours-so-far
http://www.macworld.co.uk/news/ipho...-rose-gold-force-touch-iphone-7-wwdc-3589633/
That said, it's still somewhat unclear which exact phone the OP has really been interested in talking about here.