As much as I wish this would happen, I do believe that it won't because it would be a nightmare for the devs to have every NPC available in the game for eternal bonding. As mentioned before, if they were to have certain characters available for marriage, we will have people complaining that their favorite NPC is not on the list. With this in mind, the NPCs that died, yeah, they're not going to be there either because it would be flat out weird they came back to life (you're marrying a zombie).

Also the thing about thousands of players being married to the same NPC, it's no different than how we play Main Scenario. The story is the exact same for all of us except the player which is me-you are the hero/heroine while the others are just side characters helping out.

If somehow, someday it does happen, I'm heading straight to Aymeric and making him my husband!