In a little over 24 hours I might have my copy of Harry Potter and the Deathly Hallows in my hot little hands. I'm pretty much definitely not going at midnight now but who knows?!
It's all rather exciting.
So this is what I think will happen:
Pettigrew is toast. Harry will have some link to that due to the wizards debt between the two.
All of the Weasley's will survive. There's been a lot of talk on fansites that with the sheer number of them, odds are at least one must die. Personally I think that's too obvious and so JKR won't have used that twist
If a Weasley will die, it won't be Ron. I've got a feeling JKR already stated that sometime ago. Something to do with it being cliche for the sidekick to bite it.
The last word of the book will not be scar.
Snape will turn out to actually be on Harry's side and will be instrumental in helping him.
Nothing important will happen on Hallowe'en or if it does it won't be the major turning point in the book.
Harry's going to die. As a writer it makes sense for JKR to do that otherwise she will never get full closure on the series.
One of the Horcruxes is hidden in the room of requirement.
RAB is Regulus Black.
The giant chess set will make another appearance