Red robes? I have never heard that idiom. Why red?
Speculations:
Hagrid could snuff it (and I wouldn’t mind a bit) in book 7. I think it more likely that if a Weasley has to die, that it would be Percy. Who is the one that is engaged to Fleur? He won’t die, for sure.
Someone a while back said something about Hermione’s dying. Intriguing, but I think that Hermione is too loved by Rowling to do it.
Harry has to go back to the Dursley’s at least one more time–I’m betting that he and Petunia have a late noc talk or two about Lily and their childhood. Petunia may well be a Squib.
IMO, the Three need to go back to Hogwarts, but most likely will find that their school is in shambles, leading to excursions for DA members to go exploring. Frankly, I can see Harry being pulled out of class to go help with some projects.
Locations that will be important in book 7:
Hogwarts
Dursley’s house
Riddle’s house
Snape’s house (?)
Potter’s old house
Black’s house
The inn where HP and Hagrid first get to Diagon Alley
As for horcruxes (which just confuse me no end. I also don’t get why or how HP is a horcrux. If Voldy wanted to kill him right there and then, why and how would he make HP a horcrux? And WHY did the avada curse boomerang on V that way? Never been explained really).
Voldy is nothing if not proud and arrogant–which will be his downfall. He would not use a manky old boot for a horcrux. He is almost a fetishist, wanting something from all 4 houses, for example. They will be objects that are revered by others–which would add to the joke for Voldemort.
Lots more spec: Ginny won’t “be good”, but will insist on following Harry; Hermione and Ron will at least have a decent kiss, if not more. McGonagall will die (I like her, but) as will Molly Weasley(?). None of the major kids will die.
This is fun.