Originally Posted by
Kae
Could also work. It could be a pretty interesting conclusion if, for example, we fight on Argus, aiding the army of light in the dailies, then in the raid we take down some big demons and defeat Kil'Jaedan as the second last boss... only for Sargeras to turn up and chase us the fuck out of there. Maybe the last encounter involves us closing the portal on our end as we flee Argus, pushing back demons as they try to break through the portal while we seal it.
So, we actually ultimately lose on Argus, but succeed in sealing the portal in the final cinematic (Illidan or Khadgar sacrifices himself Brox style to hold back Sargeras?), removing the Legion threat but still leaving them lurking out there for a future more fleshed out interplanetary thing, and not removing them as potential villains entirely.