I think Ron & Hermione will get together, & the Second War will get underway so Hogwarts' security etc will be much tighter. The Order of the Phoenix is gonna have to get a new headquarters, because I think Grimmauld Place was entitled away to Bellatrix Lestrange...I also reckon Fudge will either be sacked or resign from his Minister of Magicship because he failed to announce to the wizarding world for 12 months that Voldemort had returned... & I think it's quite likely that Mr Weasley will be Fudge's successor, because Ron joked about it in book 5...
(or something) & what Ron jokes about usually turns out to be true...We've got as much chance of that as my dad has of becoming Minister of Magic!
Anyway, would be interesting to hear your thoughts...
redwellyboots