Mag'har and Forsaken Greatness

I wonder since the Forsaken and the Mag’har are squarely aligned, will any of those with neutral-ish leaders come around and join Sylvanas and Geya’rah. Just imagine their reactions when Sylvanas delivers some Proudmoore heads on platters and spikes and that pendulum starts swinging her way again. I can’t wait to see whats in store.