With the comments on xperia blog and Sony wanting to make a profit on phones or dump the business you'd think they would release in the US and fight to be a contendor. Or maybe this is a wakeup call on how crappy it is to deal with the US carriers, they even killed the Z4v recently.
Personally I want to try the Nexus 6P but if it turns out to be too damn big I'll import a Z5. Gladly do a Z5 first if they brought it to the US and commit to continuing with their phones. Loved the Z3 compact but just a bit small for me, love my Z2 tablet too.