Here in the US, the only special sets are from mainstream houses and they are special because they come in perfume-cream combo, and cost just a few dollars more than the perfume alone. At Macys yesterday I saw already all the estee lauder gift sets out. I have not paid attention to Chanel and guerlain, but i supposed they could also come up with something, but, if they do, only of the best sellers, no 5, coco, allure, or the little black stuff. In other words, not much to hope for, unless you need a bottle of any of the above and want the cream as well.
I don't remember anything from niche. Tom Ford last weekend had a set of 10ml bottles, where the only special thing was that they costed a whopping $310. Diptyque usually comes out with a special set of christmas candles. Nothing else comes to mind.