The mindset of roping others in was essential. Without the lure of substantial benefits, Kael'thas and Patrick would certainly never agree to let Quel'Thalas take part in a major war alone.
Faced with a new continent, even if the Arcane Pact made no preparations, the other powers would certainly act. The Alliance and Shattrath had reached a preliminary understanding on joining forces. Patrick believed that wiping out Auchindoun would be their first joint operation. Although Auchindoun's forces were far from insignificant, with the Shadow Cult, Ethereals, and other factions deeply entrenched there, Patrick did not believe that little backwater could survive a combined assault by Shattrath and the Alliance unscathed.
When that happened, the Alliance would stand on the same side as Shattrath, and even the Kurenai, the Broken, and others, adding several more capable forces to its ranks.
As for the Horde, Patrick believed it would certainly intervene. The Pandaren Chen had good relations with the Horde. Back when order was being established among the Horde in Durotar, Rexxar and Chen had contributed a great deal. Rexxar had led the entire Mok'Nathal Clan into the Horde, and whether for public or personal reasons, Thrall would extend a helping hand to Chen.
Although the disappearance of the Forsaken had cost the Horde a major force and might even cost it its influence over the Eastern Kingdoms, Rexxar's arrival, along with Thrall's earlier acceptance of Frost King Malakk and his Frost Trolls, had brought the Horde's strength to unprecedented heights.
Recalling what he remembered about the Pandaren, the Zandalari Trolls should have been the first race to discover Pandaria. Previously, Vol'jin had driven the Zandalari Trolls out of the Echo Isles. This time, Zandalar itself had been destroyed in the Cataclysm. Now, the Zandalari seemed to have allied with the Mogu,