It would be really interesting to see how they would be used in the game. I could see them being similar to Eagles.
Also, since all the expansions are based off of a story line, Which one do you think could be used to focus on the elves and their territory? It's been a while since I read the books, Were they doing anything during this time?
the end of the third age really saw the elves' time over….they were all pretty much making their way to the grey havens to depart middle earth
there were however a few things of note…dol guldur attacked lothlorien twice (i think) during the war of the ring, so i can see lorien really getting some orc attacks as storylines
also given the mirkwood was pretty near (and in the same place as thranduil's elves) then i see a return to mirkwood
rivendell had the wilderness of the trollshaws and the misty mountains near, both of which i am especially looking forward to