Oh, Twelve! Run! It's Everquest XIV! All It needs is a cataclysmic dragon waking from its slumber to cause massive destruction across the land!

That said, I think adding Vanadiel zones would be a bit much, it would start to take away from the lore of these lands. You could use areas that are referenced in XI but not in the game, Sorta to make it seems like they're related, but not enough to make comparisons.