I doubt we will see DR Loki, this Arc seems to be Ending very soon,
We might get a Scene similar to this one from Punk Hazard, but with Loki, Giants, SHs, Egghead Survivors instead,
The World should hear "Elbaph is Back", not "Yonko Crew already Defeated Strongest Giant",
If Oda wanted to make Elbaph a Hype Tool for SHs, He would have also made them Defeat Dorry/Brogy, but look what happened.
I think better Candidate of getting Domi-Reversed is Gaban, not only We would see Continuation of his Fight against Luffy/Zoro, but it would also mirror Xebec's Incident as Gaban's Wife & Kid are there, and Oda bringing him back to Sun World is very suspicious, not to mention that He would still be able to instruct Luffy/Zoro/Loki on how to use their CoC thanks to Luffy hearing his Voice (Similar to Xebec with Roger/Garp),
I'm not sure of it, I think Oda can just wrap up this Arc & be done with it, but if anyone gonna get Domi-Reversed, then I prefer to see Loki & SHs Fight Gaban, not Loki.