I agree totally with Sirius27 and fenrirbound. I think it will only be the trio going on the horcrux hunt (with some help from the others). Maybe Ginny will be with them at the climax. But it's been all about the trio for most of books so it seems fitting that it's just them. (Ok I admit it, I HATE the whole Harry/Ginny ship). I haven't heard about J.K saying that either, but if that's the case then I'm betting on Snape and Aberforth playing MASSIVE roles in helping Harry. (Whether he knows it or not). He will need all the help he can get. But I will also be gutted if Hogwarts doesn't reopen because I think it's like a character too.