I thought the Dumbledore = Ron back in time thing was remarkably well put together from a literary analysis sort of tack, even if the idea itself didn't resonate for me (and JKR hadn't shot it down).

I'm not sure why so many folks think she's going to off Snape. Maybe they see that the only way for him to be redeemed? I'm just not sure what it would serve. I think it's more likely to be Molly (or maybe Arthur) than one of the Weasley kids that dies. I also vaguely want Hermione to say "what was I thinking, dating Ron?" though of course I know JKR would *never* let her end up with Snape one day.