Viking related decorations would be great, perhaps they could even add in lutefisk (I am of Scandinavian ancestry, and have actually eaten the stuff), pickled herring, and lingonberry jam or pancakes with lingonberry syrup. I love, love, love the crafting ideas. Pickling, canning, and making freezer jams would be great new skills.
Igloos, additional hiking trails (at least 2 packs have hiking trails so far), and ice sculpting (or even sculpting in general) would be great!
Archery with shooting targets for the arrows would also be good. Hunting though...may go too far and gather too many complaints/protests/boycotts from radical animal rights activists (the same ones who eventually stopped all the circuses here in the US from using any animals in their performances). Some of those would even say there should be no zoos, but if there were no zoos, young people who never went to a zoo would not learn how to appreciate the variety of wildlife and the dangers of extinction, let alone have any clue how to rehabilitate injured wildlife. (After all, they can only take a certain amount of electives, and often must choose between things like psychology, sociology, art, drama, and music).
Sledding and werewolves would fit in perfectly here, as would say, ice fairies, and mining dwarves. Speaking of mines, a nice underground maze would be perfect about now. Maybe I'll go build one in my game. Too bad there aren't enough stalactite/stalagmite and crystal decorations, let alone ancient cave drawings, runes, and the like. Treehouses would be a fantastic feature as well. I haven't yet been able to construct a credible treehouse using the current build tools available in the vanilla game. There is, for instance, no leaf roofs (straw roofs yes, leaf and branch roofs no), no wall decorations of branches sticking out, and no bark wallpaper.
Or, they could even go for the Siberian version of Area 51, and add a fortified area around a crashed UFO. And there could even be an area around the UFO inside the borders of the fence (which has caution signs on each side) where there is a very light radiation leak - enough to make Sims in the area nauseous, but not enough to invite the Grim Reaper, or else 100% curable with treatment in the hospital, leaving them bald but well (something the player can manually change back in CAS editing).
(Besides, those of us with custom hairs often have ended up with bald Sims after the mods were all disabled by a patch.)
