Sorry for posting old pics, I've been through about forty pages of this thread and hadn't seen them posted/seen any mention of them, so my bad! I'd also seen plenty of posts where people were still hypothesising that the horse legs were articulated (only a few pages back) so I don't think getting so worked up about it was entirely necessary.
The Witch King is bound to get a helmeted version for the Battle of Pelennor, but since he didn't wear it prior to RotK I think the generic Nazgûl are fine. I'd like to maybe see a set of the 'Twilight' Nazgûl, but I don't think any other differentiation is necessary.
Curious as to what will be covered in next season's sets (LotR, not The Hobbit). Bound to be Battle of Pelennor, though I hope we see some Imladris as well - council of Elrond maybe? Except that seems like it would be overwhelmingly minifig heavy. Thinking of most of the scenes in LotR it will all be really minifig heavy, but I think TLG have done a great job with the current sets as they are now. I imagine the Hobbit will be a nightmare too with that massive party of Dwarves!