I'm still not convinced the OLED iPhone is going to be as premium as so many of you think. What, exactly, is so "premium" about this new iPhone compared to a nearly bezel-free OLED Galaxy S8 I can pickup at Best Buy for cheaper than an iPhone 7 right now? Not much based on what we know.
If there is a 7S or something similar, NO ONE is going to care about it. The 6, 6S, and 7 were all the same design...many of you literally think this year's volume model (still a flagship phone) is going to be a FOURTH year of the same recycled design commanding the same price points when competitors are already way ahead in this regard? That would be absolutely ridiculous. No one that cares about tech will want a 7S, it would immediately be branded a "budget model" and it would generate no buzz. The OLED iPhone is all that matters this year. It's going to be huge, generate a ton of buzz, and everyone is going to want it assuming it's competitive. If they price it way above competitors, it will most definitely hurt them. As I've said before...I'm a total Apple fan, but even I would buy a (admittedly pretty solid) Galaxy S8 over a warmed over iPhone 7 if that's all my budget allowed. I think a lot of others would as well. There is no chance of Apple doing this. None.
My prediction....They will carry over the 7 for another year (likely re-branded with modest physical changes but mostly carryover specs similar to how they launched the 'new' low cost 2017 iPad), and it will be at a lower price point to cover the entire lower end of the spectrum as the 6S and 7 will be discontinued. The iPhone 8/Pro/Whatever will be the true flagship model this year. I'd estimate an $849-1049 price range (in the US). Anything above that is unlikely.
"iPhone/iPhone Plus" (carried over iPhone 7 specs with modest physical changes, price drop, likely re-branded)
32gb - $549/649
128gb - $649/749
256gb -$749/849
"iPhone Pro" (new flagship)
64gb - $849
128gb - $949
256gb - $1049
Eventually the Plus models will be phased out and there will simply be iPhone (smaller) and iPhone Pro (larger, more feature-rich)...but the Plus will likely stick around at a lower price point during this transition year. All of this is guesswork on my part...though based on logic and moves Apple has been making to streamline its lineup as of late.