You will not be too happy with what is to come for the iPhone 7. Not much will change. Design will barely change, better camare and other things like no headphone holes. Most thing that will be released at things that apple are releasing for the first time like no headphone holes and those things. Design will probably change for the 7s or 8.
This is what is pretty much known to the public, there are always thing that are kept from the public even if peoplw try to leak it.