They probably won't but I'd be curious to see what stances would be added... as long as they're now stupid like in DC Universe Online.
Idle pose animation choices would be great. The more character variety, the better. My only concern would be if there was an "over the top" pose that was everyone's go-to pose.
Every race has the exact same animations right? Khajits move the same as Orcs, etc? It shouldn't be too hard for them to add animations considering everyone looks the same.
Dances are different, but yeah everyone in general shares the same animations. I think they should add the 'wall leaning, coin flipping" animation for players that some NPC's have.