What can Replace a 15 Season Giant?

Friday afternoon I learned that Season 15 will be the last of Supernatural. Many in the fandom seem to already be mourning the loss of the show even though we have yet to finish Season 14. Friday night and part of Saturday I felt a little lost myself - the show and fam-dom helped restore my sense of self after a rough 2016 - but then my thoughts turned to the question of what will end up replacing it on the CW? The other shows holding similar timeslots the rest of the week on the network have failed to hold my attention, and as a fan of fantasy, sci-fi, and horror, I fear that once Supernatural is gone, there will be no new fandom to take its place during my weekly TV perusal.