Think about it. The whole reason oryx showed up was because Cota sent him a message during the Dark Below? There was a mission and at the end dinklebot says something about a message being sent somewhere. In TTK there is a mission (after the main campaign?) where a Cabal boss sends a message to the empire. So what if that is the pve event? I think having the patrol world invaded with high light level enemies would be awesome. Escpecially the Cabal.