Cool idea for the Legion launch event

Before the full scale invasion starts a sort of burning legion envoy/ possessed npc appears before each of the leaders of every race. The envoy offers them unmeasurable power for an alliance with the burning legion, just as sargeras offered the Dranei. We could get to see each of the leaders deny it and kill the envoy, which then starts the launch event. Maybe an envoy could be sent to other lesser known races as well such as the Timbermaw, Centaur, Quillboar, ect, and some of them can accept showing a demonic version of each race. Just a cool idea it will probably never happen though