The New routes which are set to start in December are:
YYZ(Toronto)-LRM(La Romana)
YUL(Montreal-AZS(Samana/El Catey)
YUL-PUJ(Punta Cana) Not new but increased frequencies
YHX(Halifax)-AZS
Note that these flights are seasonal and will most likely be gone by April of next year. Apparently Samana is doing well as an tourist destination...hopefully other carriers will follow. United Airlines is also offering a non stop weekly flight (Sat.) out of IAD (Washington D.C.) into Punta Cana and twice weekly (Sat. and Wen.) out of ORD (Chicago, IL)
Here is the AC link:
AIR CANADA - ROUTE & NETWORK - FLEET | Air Canada and Air Canada Vacations bring more holiday sun to Canadians this winter; over 560 flights each week from Canada to more destinations