This is the first rumor i've seen related to the January 1st winter wave of 2017.
Sounds like a Yoda's Hut, the UCS Snowspeeder, and a new round of microfighters series 4, and a few Rogue One battlepacks are on the way..
It sounds like the following could happen.
75144 UCS Snowspeeder
Yoda's Hutt
75160 (rebel pilot), 75161 (tie pilot), 75162 (rebel pilot), 75163 (Imperial Officer)
75164 Rogue One Rebel Battle Pack
75165 Rogue One Imperial Battle Pack
75166 Set with R2D2, and Yoda
75169 (possible landspeeder or could be Tusken Raider Attack themed set) has Luke, Obi-Wan, 3PO, and Tusken Raider
75170 (rebels set with Chopper, Kanan, Thrawn)
75171 Rogue One set with 3 minis (AT-AT's might be safe for a while!)
75272 Rebels set
75173 (sounds like a jedi final duel type set) with Qui-Gon, Obi-Wan and Maul
75174 Desert Skiff with Han, Chewie, Fett, Weequay
75179 Set with Lando, Rebel Pilot, Crewman
http://www.bouwsteentjes.info/gerucht-eerste-details-van-de-lego-star-wars-2017-sets/