You know I forgot something from POA, p. 427 about Peter Pettigrew:
"Pettigrew owes his life to you. You have sent Lord Voldemort a deputy who is in your debt... When one wizard saves another wizard's life, it creates a certain bond between them...and I'm much mistaken if Voldemort wants a servant in the debt of Harry Potter."
Oy, that has to come back in the final book, I doubt Wormtail told Voldemort about that or he would be dead. Let's not forget either that Harry's and Voldemort's wands will not do battle properly against each other, who knows what could happen besides the reverse spell effect.
Now, supposing that Hogwarts does not reopen in the next book--just supposing--how creepy will it be if HP has to return there for some reason? What are some of the other locations the gang is likely to visit in book 7? HP mentioned Godric's cave (or hollow?), isn't that where Sirius hid out near Hogsmeade? Is it just me or does HP's plan to visit his parent's grave a really bad idea? Seems about as safe as wearing stilettos in a slasher flick. No good can come from it, not with VM and the DEs on the loose.