It would be cool.
After the Legion's defeat, some Eredar surrendered to the Army of the Light, ready for their execution. Meanwhile, the Banshee Queen learned of their situation, and offered the service of the Horde Shamans and Warlocks - they would help the Man'ari heal and control their demonic infusion. In trade, they would join the Horde against the Alliance and, more importantly, the traitorous Draenei who rejected Kil'jaeden's vision and murdered their comrades.
Meanwhile, the Krokul of Argus join the Alliance, to help avenge their dying planet against the atrocious Man'ari eredar, who joined the Horde. This factions is betraying Azeroth by protecting the Eredar. They will BURN!