Appears to be planning to head back to Alaska, I guess his aim is both Whooper Swan and Gray-headed Chickadee (Siberian Tit), although I have not seen any records of either this winter. I guess Steller's Eider may still be there as some have been on Kodiak recently.
2016 John got Whooper Swan on the last possible moment. I think he will try to the very end this year.
http://www.birdingfordevils.com/p/this-is-listing-of-species-so-far.html
Whooper Swan
Adak, Alaska, sunset 31 December, 2016. Whew.