Are you going to have Divia show up? She should still be entombed in Egypt with a major chip on her shoulder.
Author's response
I'm considering having a Gringotts cures breaker find her. Maybe someone on Bill's team. (Not Bill, though. He doesn't deserve to have Divia kill him.) Frankly, it would make more sense to me in this AU for curse breakers to dig up Qa'ra's tomb.
Oh! Or I could have her kill off Bill, and have a vindictive Ginny break off the betrothal contract! Oh, the possibilities...