Skylake released a year ago, most likely locked Kabylake parts will come out very soon: it's the same 14nm node plus some minor change.
Unlocked parts? Kabylake-X is coming next year, but we still don't know if there are any other unlocked chips in the desktop line... though after what Intel said about regretting not releasing all Broadwell cpus for desktop in 2014 I think they won't do the same twice.
That said some kind of 7700K is coming this year for sure, better than 6700K? Not by much, but new is new, also Optane SSD support will be a nice thing to have. Look for 200series motherboard and when they start to pop out that will be the time the cpus arrive.