It sure is hard to think of creative titles that won't possibly spoil anyone!
Anyway, I read somewhere (that doesn't mean it's true!) that in one of the two future books, 'a Weasley will die'. The only reason I see any possible truth in that would be the experience that Mrs. Weasley had with the boggart, in book 5: when she went through all her children laying on the floor, dead. It seems to me J.K. Rowling rarely takes the time to explain something in detail without it having some significance later on (i.e. the family tree at Black's house, learning about Kreacher, the foreshadowing with the veil, the introduction of Luna, etc.). I just have this bad feeling that the boggart scene might be foreshadowing for things to come.
I seem to remember J.K. Rowling saying, somewhere, that she wouldn't kill off the trio (or maybe that was just for book 5!). So, I don't think the 'Weasley that will die' (again, not definite!) would be Ron. As other posters have pointed out when we speculated on book 5's death, Ginny has nearly lost her life once in book 2, so I don't think it'd be her. This leaves:
Charlie in Romania
Bill who works at Gringotts Bank
Fred or George who now run Weasley's Wizarding Wheezes
Percy who works for the Ministry of Magic
We really don't know a lot about Bill or Charlie, so I don't know if that would be an impacting death. It could be Percy, making amends with his family only to die soon afterwards, but would the reader feel impacted by Percy's death? Don't get me wrong--a death is a death, and really, Sirius wasn't making himself all too well liked in book 5, and his death still hit people hard.
It could be one of the twins--given their close connection, that would come as a real blow. I wonder if J.K. Rowling won't make 'the war' personal for the Weasley family as she has done for Harry and for Neville. What are your thoughts? If anyone can quote the information I've shared or sees something that needs to be corrected, by all means, do so! Some of it is my own speculation . . . personally, I hope *no* Weasleys die! Oh, and one last thing I left out Mr. and Mrs. Weasley! Mr. Weasley was almost fatally wounded in book 5, so I don't think he'd be killed, but what about Mrs. Weasley? I had her pegged as the death in book 5, and I wasn't looking forward to that. Thoughts?