Dude, that idea is so 2018Christmas 3000 no45 by Tim, on FlickrYawn, been there done that.
I’m not a fan of duck on call, but I was watching the advent calendar and the train looks nice. I don’t know if these are new molds but I think it would be wonderful to have a Christmas themed train.
Another idea would be an advent calendar with Santa and elves taking care of the arctic animals. With ice bears, arctic foxes, arctic hares, seals, snow owl, reindeers and a pet husky. No penguins off course.