I wouldn't want to see anything like Morrowind's creatures in Skyrim (with the possible exception of a fixed cliffracer, for reasons I'll explain below). As I've noted before, they're strange and foreign looking because they're isolated and they live in a f-ed up environment. See this quote from the Pocket Guide to the Empire (1st Edition):
The traveler, upon crossing Shadowgate Pass, may be forgiven for believing that he has left Tamriel and entered a different world. The sky is darkened regularly by furious ash storms belched forth from the mighty Vvardenfell volcano. The familiar flora and fauna of Tamriel is exchanged for bizarre and twisted forms that can survive the regular ashfall.
Notice how the only creatures that were present in previous Elder Scrolls games (besides Daedra) were rats, dreugh, and slaughterfish? Two of those are aquatic, and the third's presence can be explained by real-world history (rats hiding in the cargo of a ship and disembarking in the new world). What does that tell you? The ecology of Vvardenfell is nothing like the rest of the province. While that doesn't preclude unique wildlife for Skyrim, it does mean that the wildlife of Vvardenfell is specifically adapted to, well, Vvardenfell, and it couldn't thrive elsewhere. On the same note of isolation, Morrowind is blocked off from the rest of Tamriel by, again according to the PGE, a mountain range high enough to block off the ash clouds from Vvardenfell (which is why the rest of the empire has clear skies). That means that, even where mainland Morrowind connects to Skyrim, the majority of creatures wouldn't be able to migrate into that region. That being said, Cliffracers have a notable advantage in clearing oceans and mountains, so it seems likely that we would see some relative in Skyrim that has adapted to the cold (like speciation in birds).
Skryim, however, is connected to the rest of Tamriel along a pretty wide border, meaning that creatures from Cyrodiil, Hammerfell and High Rock would be able to migrate into that region with greater ease, and many of them like Ogres and Minotaurs are already shown in Cyrodiil to do pretty well in colder climates (Jerall Mountains), so it also seems likely that we'll see those return as well.
My guess, based on Bethesda's track record, for the bestiary of Skyrim is: minotaurs, ogres, dreugh, slaughterfish, imps, rats, bats, harpies, giants, cliffracers, spriggans, horkers, Rieklings (in lieu of goblins), udyrfrykte, grahl, wolves, bears, boars, werecreatures and some fantasy-themed variations on wolverines, lynx(es?), reindeer and muskoxen. And, of course, Daedra and undead. This encompasses all possible creatures I'm predicting-- also based on Bethesda's track record, I doubt all of these would make it in. Also, I want to state for the record that I would expect all returning creatures to get a full makeover to feel more specialized to Skyrim.