According to GMSArena here: and Android Central here:
Pricing will start at $399 for the 6/64 GB entry-level model. Higher-spec'd models with 8/128 GB and 10/256 aren't official yet but may also be coming too.
It's great to see a new mid-range/higher-end device being offered in the US again and at a very competitive price. Hopefully the US will also get a true successor to the Axon 7 soon too.