Hmmm i like this list... very nice... interesting...Could playable Mogu be the Pandaren allied race? While Lightforged Undead the one for the forsaken? I still suspect Saberon is the Worgen.
The introduction of good Mogu clan, has nos significantly increased their likelihood of playability, and hailing from Pandaria, it seems logical they are the Pandaren allied race, although they lean horde because of the Zandalari, face it horde and Zandalari have fought other Mogu clans just as much, however, like the darkspears were the one friendly troll tribe at the start of wow, we could have 1 friendly Mogu clan. That one could be both factions like the Pandaren.
Saberon get added too, they get enhanced by the Tol'vir in the final epilogue concerning the Forge of Origination alternatively a story involving the Apexis crystals and the Arrakoa could be thesource of their boosted intelligence.
Faction Assignment
Well, when it comes to faction assignment, which would make most sense?
Mogu - horde
Saberon - Alliance
Lightforged Undead - both factions
Saberon - horde
Lightforged Undead - Alliance
Mogu - both factions
Mogu - alliance
Saberon - horde
Lightforged undead both factions
Lightforged - alliance
Mogu - horde
Saberon - both factions
There is a possibility we could get other races for the worgen, undead and Pandaren: E.g. Nelf or wrathion worgen, vampires or undead elves for forsaken and Tuskaar or new Pandaren off shoot for the Pandaren. Undead elves seems very unlikely as the forsaken allied race, because it's elven and would fit a round 2 of allied races for blood elves as San'layn. Vampires I would have preferred to Lightforged undead but they could a very powerful new feature.