Here is an overview of 2017 tires from tracktuned: http://www.tracktuned.com/feed/2016/...-tire-overview
It's a very brief summary description of the various performance street tires for 2017. In the comments at the bottom, Andy Hollis predicts that the Dunlop Direzza Z3 won't really be available in the US until 2018.
I hope we will see some more detailed tire test results soon. GRM, Tire Rack, David... :)