We check in at Poly on Jan. 25th (after four nights at AKL Jambo Villas), but haven't gotten any letters. From what I've read on Tikiman's Facebook page, the Volcano Pool will be open all month. The Never Land Club is open until Jan. 28 (that's official); and, yes, the monorail will be closed weekdays between 11:30 and 7 (also official, per Disney press release). I couldn't tell from my reading if any new construction/refub will be going on THIS particular month in the Grand Ceremonial House, but I think -- ? -- the speculation is that the closed Wyland Galleries might be used as a temporary reception area while the current reception is refurbed. And/or, the Wyland Galleries space -- already closed -- might become DVC check-in area. I am definitely not a reliable source, myself: We've never even been to Disney before! This is all just what I've read via Tikiman, plus Disboards.