According to Mac Otakara, the new model of iPhone launched in 2017 will be iPhone 7s and iPhone 7s Plus which are the updated version of iPhone 7 and iPhone 7 Plus.
The basic design will reportedly remain the same, and that the only internal update will include the change of the CPU to a faster A11 chip. And it does not seem to come with either the wireless charge or glass casing.
And, it would highly probably that the red color will be added to the lineup.
There are also vague rumors of a third variant in addition to the 7s and 7s Plus models with a curved screen, but the website is less certain.