His whole group is there, He just died the second he stepped foot on my land. Must have been quite a sight to see my mega fortress. I'm still a Mountainhome. But my highest Nobel is a Countess. What will happen? Will I not get my keepers
My whole castle has been one massive successful step after the other and now BAM failure.
(edit for typo)
If you don't mind starting over again with new dwarves but the same fortress, you can try abandoning the fort. Then you can reclaim the same fortress with all your buildings. You will have to start over with 7 new dwarves, but all the items from your old fort will be scattered randomly over the map, and any work you had done up until then is preserved.
I think that reclaiming advances time about a year and thus makes Legends mode advance, which means a new King should be found before the reclaim. I'm not 100% sure though, so you might want to wait until someone confirms that info before trying it.
Also, that is unfortunate but funny about your King. Have you looked for him in Legends mode? If you'd like to look but have a fortress saved, you can do that by copying and pasting the game so there is a second copy for you to look interesting figures up in that world's history, like that King. Then you'd open the copy of the game you just made and load it's save and abandon that fortress instead of your original. This is because a world's legends can't be viewed while there is an active dwarf fort or adventurer game in that world if I remember correctly.