Evil Sylvanas might be back as well and need killing by Forsaken alongside Death Knight Arthas and the Scarlet Crusade Leader at Lordaeron.
Evil Sylvanas can also pop up at Orgrimmar so that problem must be accounted for as well.
Technically for Eastern Kingdoms we have 3 threats at Undercity(Evil Sylvanas, Death Knight Arthas and the Scarlet Crusade Leader), 2 threats at Dalaran(Sinestra and Garithos), 5 threats at Stormwind(Alleria after consuming N’Zoth, Onyxia, Gul’dan and whoever Garrosh put in charge of Stormwind), 4 threats at Blackrock Spire(Emperor Thassarian/Ragnaros, Blackhand, Rend Blackhand, Nefarian & Doomhammer), 3 threats at Grim Batol(Sinestra with Cho’Gall, Dargonax and Modgud Thassarian) and 2 threats at Quel’Thalas(Dar’Khan Drathir and Kael’thas).
For Kalimdor we have 2 threats at Orgrimmar(Garrosh and Evil Sylvanas), 1 threat at a newly restored Proudmoore Castle at Tidefury Cove in Dustwallow Marsh(obviously Admiral Proudmoore), 1 threat at Thunder Bluff(Magatha Grimtotem), 1 threat at Teldrassil(Xavius’s Branch), 1 threat at Azshara(Xavius himself) and 1 threat at Ahn’Qiraj(C’Thun).
For Northrend we have 5 threats(Frost Troll Empire, Lich King, Yogg-Saron, Galakrond whom we might kill in Dragonflight and Malygos) all of which have their own bases of operations.
For Pandaria we have 3 threats: Grand Empress Shek’zeer, Grand Empress Shek’zara and Emperor Lei Shen.
For Zandalar we have 4 allied threats: Zul, Zul’s apprentice, Eternal Emperor Korthek and G’huun.
For Kul’Tiras we have 2 allied threats in Lady Ashvane and Lord Stormsong plus one opposing threat in Lady Waycrest.
For Broken Isles it is fortunate that one of the Elisandes watching the Timeways decided to throw her lot in with us as that means she is a good guy helping us fight off Xavius in Val’Sharah.