Elbaf will be an all out war, just like marineford. Luffy does some severe damage to WG that can't be ignored before he runs away to Elbaf. That's my interpretation anyway.
And this very chapter sort of confirms it, they want to head for Elbaf. It's 100% confirmed as they might still battle it out, but all signs point to Elbaf being the place for the next big war. Expecting many chapters there.
Idk, im not entirely expecting it to be WG or Marine centric. We know the 4th Poneglyph probably isnt there since Shanks left there casually, so I doubt its central to a Yonko conflict as well.
I also think VP is fleeing to Elbaf because they legitimately might be the strongest country in the world so the Marines/WG may not attack them there or escalate a war there lightly.
Another reason for me is if Kizaru loses here, there is potential for Saturn to get the Seraphim and Mother Flame. That may just be victory enough for the WG at least for now. Id have a hard time seeing Elbaf just being the 2nd round of Marines/WG so quickly.
I still think a big conflict is happening there, but just more internal imo