All the cool kids will say 'Hey man I have the iPhone Pro harrr diiii darrrr'.Only things I disagree with are:
7S & 7S Plus IMO will definitely have home buttons.
iPhone X Edition probably will be iPhone Pro.
This is going to be one heck of an event.
Just kidding there of course won't be an iPhone Pro and my example is one of the many reasons why. It's about the lamest name possible.