I just think "shadows" or "shadow" is more expandable name and suits better than just void. Even tho is basically the same thing. But we had a more expansion about the light when we played at argus in legion, and light-forged, so now i would be expecting a more shadow-forged.
Last expansion was more about from middle to top and now i would expect from middle to bottom, cause that's our journey now.
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Into the Shadow would be a better expansion name, compared to "Wrath of THE Bolvar" and many things i have seen xD