I still hope for an updated iPhone 6C which hopefully stays at 4" and uses the same back colors but with a white front.
I still think the 5S will become the 5C-Touch ID etc, but in a plastic case.
Apple have (AFAICR) always used the outgoing top end handset as the new entry level phone, so I don't think they'll change that now.
The 5C was a massive seller for them, so I'll think they just carry that on.