So, I suggest Enroth without Retribution and with the Chronicles tweaked (the inconsistencies I fixed will be mentioned). When Sar comes, we'll decide. We can hold a vote on the six options presented above.
By the way, I have a feeling that NWC and Caningham initially planned to make Jadame the setting for the 4th game (there's a "continental" trend: the first, 2nd, and 6th games take place in Enroth, the 3rd and 7th in Antagarich, and the 8th in Jadame), but 3DO decided to kill off Enroth and move the setting to the "backup" world – Axeoth.
Added 5 minutes later
In general, I just think that we shouldn't create a complicated RPG storyline with new rulers, etc. Instead, we should just bypass the cataclysm and continue the story...
Besides, all the main characters have already been created.
The most important thing is that Saruman doesn't get stubborn and decide to rewrite everything...