User blog comment:RyftLord/Hollow Ichigo-Will he come back?/@comment-7036496-20130309061130

I don't think so, they merged together creating one being so I think that hollow Ichigo's entire being is already in the sword, I also think they can't split up since they were the same being to begin with. So Hollow Ichigo's power might just be in the sword combined with Ichigo's soul reaper powers (without Hollow Ichigo's conscious and mask, so he can't tell Ichigo what to do anymore or boost Ichigo's power but instead the sword.)