User blog comment:KillRoy231/Lucifer in Season 13.../@comment-10889355-20170823105642

I think the first half of the season will be focused on Dean grieving over Castiel's "death" and Mary's disappearance, Sam trying to figure out (I guess?) Jack and Castiel in The Empty. Then after the midseason finale, the whole alternate universe will be the focus. I don't think they'll write Lucifer out in 2 episodes when Pellegrino is (unfortunately) still part of the main cast.