User blog comment:Gabrielaaloo/My own theory/@comment-31057575-20180512085402

I agree with all your hopes; and if I'm right the producers said that in s14 the Empty will be explored so maybe Gabriel will return. This or they'll set Michael free or Heaven will collapse and bilions of ghosts will kill every single life form on Earth :) . There's no going back for what they said in Funeralia.