Of all the potential allied races, Lightforged Undead are easily the most likely to happen, and ironically Undead Elves are the least likely to happen.
Lightforged Undead would serve a double function from a story perspective, which would make their inclusion all the more sensible:
- They would serve as a mirror to the Alliance Ren'dorei. The Light-infused undead and the Void-infused elves.
- Calia Menethil as I said above is being pushed to be the next leader of Lordaeron and is even counted as one of the main leaders of the Horde in the Shadowlands intro.
- Before the Storm, a brilliant novel written by Golden, states that many Forsaken want to be reunited with their human kin. The Lightforged Human represent the final step towards this reunion, combining the undead aspect with the Light, which is the most important cultural aspect of the Human kingdoms.
Meanwhile Undead Elves are not likely, at all. If Blizzard wanted them to be playable, they would have added them either at start of BfA with Prince Dreven and his San'layn, or at the end of Bfa with the abdication of Sylvanas and return of Calia.
Undead Elves might be the hypothetical race that Blizzard is LEAST interested in. Upright Forsaken are more likely to happen.
But that's alright because if you want to play Sylvanas you can just make a Void elf and choose the appropriate transmog set. There are plenty of suggestions on WoWhead and transmog forums. Is there anything the Void elves can't do?
