Billy takes the Sentry formula and battles Reynolds. They are evenly matched until Reynolds while in his subconscious thoughts decides to stop fighting the Void and become one with him. The newly-merged Sentry easily kills Billy, then removes Cranio from the pocket dimension.
Billy consumes the Sentry formula and faces off against Reynolds. They are evenly matched until Reynolds, immersed in his subconscious, decides to cease battling the Void and become one with it. The recombined Sentry easily dispatches Billy and subsequently extracts Cranio from the pocket dimension.