Seriously I would veer in the direction of the character's creator's opinion on the matter, and the Void has always seemed plenty real to me as the dark side of Robert's nature.
--Previous Message-- : In the New Avengers 4 part Snetry Arc. White : Queen showed that the Void and the desire of : the Sentry to make the world forget him was : becuase of a mental virus implanted by the : Mastermind (Jason Wyngarde) on the orders of : the Crazed General. : : The Void that attacked the New Avnegers in : the arc was seeminly a construct from the : mind of Rob Reynolds. : : So is the New Avengers correct or is the new : mini correct. Is the Void real, have of : robert, the other half being the Sentry. Or : does Robert becomce the Sentry and the Void : isnt real jsut a construct of his fears and : hatred. :