If Blizzard are at Gamescom this year then expect first looks at the 9.2 patch around there. If not then maybe September at the latest. First look =/= ptr ready
Hopefully soon. 9.1 has been on the PTR for a very long time so you've kinda gotten tired of it.
First look? 6-8 months with the patch being about a year from now, followed by 10.0 8 months later. Anyone who thinks this expansion gets a 9.3 is beyond reason.