oy... so many ideas...
Draco is a little cowardly twerp who will hide when things get rough... he'll survive.
I dont remember where I read it, but I get the impression from several interviews with J.K. Rowling that none of the trio will die (even her putting in stuff like "Harry, if he survives, lalala...")
So I don't think it'll be Ron.
I do believe the Percy/Percival theory... and I think that, as much as I'd hate to see her go, Molly will die. For those unfamiliar with the Percy/Percival theory, Percival was indirectly responsible for his mother's death and an uncle's death. I put Sirius as the "uncle."
I do think both Dumbledore and Voldemort will die.
I do think Lupin will die, but I am not sure how I feel about the Wormtail theory... Yes, I know, silver kills werewolves... I am still looking for it to be someone Lupin wouldn't ordinarily consider to be an enemy, but a "brother"... (read up on Remus and his brother in legends and mythology... Remus's brother and his followers are responsible for his death)... then again, I guess if you consider the Marauders, before James died, as brothers, then Wormtail and Lupin would be "brothers" in that respect... so it could happen...
A summing up:
Harry lives. I just refuse to believe that he would die... and I wonder how the story would continue til the end if he dies (with it being told almost entirely through his point of view.
Ron will live. This is just intuition, I don't feel like he'll die. I think he'll live a long and happy life with Hermione.
Hermione will live (see above). But she is probably the most vulnerable of the trio, and I think Ron will do something to save her life in a major way. This will make her admit to herself that she really does love him.
She will also teach Potions.
Dumbledore dies. I just know it.
Voldemort dies. No one, not even Rowling, would reel people in for seven books to have the bad guy live.
The Weasleys: Molly dies, probably in Book 6, and indirectly caused by Percy's huge mistake in believing the ministry instead of his family.
Arthur survives and becomes the next Minister of Magic.
Fred and George survive and become successful businessmen. However, if I'm wrong and Arthur dies, I believe it will fall to Fred and George to care for Ginny until she comes of age.
Ginny will live cuz I like her.
Bill and
Charlie are up in the air. I could go two ways with
Percy, but I feel like he'll die, hopefully after he's seen the error of his ways and does something to redeem himself.
The Order: Of the members of the Order, I think
Lupin will most definately die, but I am not for sure how (see above). I feel like
Tonks will live and grow to actually be a very respected witch.
Moody, I think, will not be killed in the heat of battle, but is more likely to be impaled upon his own sword, so to speak... I'd hate to see
Mundungus go, and you know, I don't think he will. I think
Snape will either be killed, or more likely, will not and will have
finally earned his spot as the teacher of DADA.
Death Eaters: Unfortunately, I think if we're talking about a ratio kinda thing, about three Death Eaters to every one Order member will survive. I don't know who those Death Eaters will be, though.
I think
Petunia may die. I agree with whoever said
Luna stands a good chance of dying, but I hate to see her go. I love that character.
Neville will live, I'm sure of it.
Frank and Alice Longbottom will, I think, be restored once the secrets out about the bad happenings at St. Mungo's. I think various members of the DA, like
Dean,
Seamus,
Lavender, the
Patils and possibly
Cho will die. I don't know about
all of them dying, but I think the group as a whole will want to be where the action is, and that will mean that some of them will die.