So. the upcoming champion has many cool things. Including wings, spikes, camouflage, scythes.
To me it sounds like an advanced stance system with more choices, but perhaps I'm wrong.
Anyhow, so I'm speculating that this Voidreaver is a mix of the champion concepts smashed together into one glorious package. Specificlly: A monster Champion from the Void, a shapeshifter and an assassin.