In Chapter 1150, after Imu gives Gunko a tail, wings, and a devil's pitchfork (but no pantsu, because Imu-kun is VERY degenerate), we see Imu give Killingham the business over his Sleeptids failures, which is HILARIOUS considering Sommers is there, too.
On the bottom of the page, we see what I believe is a Fenrir and Draugr emerging from a "Nigtmare Hole". Kllingham says there are multiple of these: I'd imagine there's at least one for each village, since they're all getting attacked, maybe more.
And, like Big Mom's Homies, we have no reason to believe Killingham going to sleep is going to make these Sleeptids going away, especially when his Devil Fruit is sleep based.
So, SOMEONE is going to have to fill Killingham's wide holes, in order to stop this madness.
Based on what we know about Devil Fruits for Law vs Doc Q in the Battle of Boob War, we know enough Haki can break through certain Devil Fruit techniques.
Considering Killingham's power level, I believe this will require CoC, meaning, the strongest fighters here are going to have to scatter, and close these hole themselves.
So, who's available? I think Shanks is in Heaven World with Kidd, but I'm counting only people there, as of now.
Loki, Luffy, Zoro, Gyaban if he gets healed, possibly Jarul.
It's actually going to be a bit of a Nightmare to fill these Nightmare Holes. I could see Usopp being involved, if CoC isn't required. If only strong Armament is needed, things are a lot better for our heroes.