The latest episode of The Disney Dish Podcast features Jim Hill and Len Testa offering up some Epcot tidbits.
1. Len has heard that the O Canada replacement is (currently) aiming for an opening/re-opening around the time of the Marathon Weekend. So mid(ish) January.
2. Hill has supposedly heard that the new China film is in flux because of the international tariffs situation, and his phrasing implies work hasn't really begun at all on that project yet because Disney's still negotiating with the Chinese government.
I'm not sure how much I believe #2, because I was under the impression that the film itself was already in production. I also don't know what the exact sticking point between Disney and China would be, given their already close business ties.
But make of that what you will!