Imo:
1. Kizaru and a group of VAs fall at Egghead
2. Fullalead is potentially transitional with no direct villain but lots of expostition on Rocks at least. The Koby/Garp incident will play out. Maybe there is some BB related ally here that loses to Luffy idk. Maybe somehow its Rocks or a Rocks clone (considering all of the clone shit happening now).
3. A separate, unknown Elbaf villain at Elbaf (I think its the God Elbaf)
4. Kid concedes to Luffy at Lodestar
5. BB falls before the final war, but at Laugh Tale (i.e. the fight for Pirate King). It seems Oda is more directly doing BBs plot than anyone else at this time, so we'll see.
6. Akainu falls next at New Marineford, first part of the final war.
7. Im falls after at Mariejois, final part of thr final war
8*. Shanks/Mihawk fall last either at God
Valley or some other undisclosed location.
*Highly depends on Shanks' role. Im not dumb enough to put all my chips in that basket, but storyline wise, it can make sense from how hes being potrayed. We'll see.
And yes im aware that this is far too much to still cover in terms of factions. Im sure half of it wont turn out this way.