Werecreatures make sense, but only the ones that could logically be found in Skyrim - Were bears, boars and wolves would be groovy. Were Guars, Nix-Hounds and Yetis (
) is not.
On a similar note, why would Cyrodilic vampires be in Skyrim? I'd have thought Skyrim Ice Vampire would have been in Skyrim. For the source, see the book "Immortal Blood". In Oblivion you can find it immediately after exiting the sewer. It's in the tent of the bandits camping outside the Alyied ruin across the lake. It details and describes all the different variations of vampire throughout Tamriel.