I did a quick internet search on my end, and found something saying that the phones aren't going to be sold by carriers. Of course most of the results that turned up appeared to be just rumours and speculation.
The new phones will not be sold by carriers in the US. Both phones should be coming to Canadian carriers, I can see the 6P under Rogers' reservation system already. Though, it only shows grey and no indication of storage size availability.
The Nexus 6P will be available via Reservation from Rogers for $699.99 outright or $199.99 on select 2-year Share Everything plans.
Stay tuned for launch date.
Can you clarify the memory size for the device on the Reservation System? (I have #9)
Based on the purchase price of $699 I am assuming it is only the 32GB model, which would be very unfortunate.