These are the titles that have been copy righted by Seabottom Productions, but haven't been decided on:
Harry Potter and the Fortress of Shadows
Harry Potter and the Green Flame Torch
Harry Potter and the Mudblood Revolt
Harry Potter and the Battle for Hogwarts
Harry Potter and the Final Revelation
I don't believe the Mudblood one will be used because of the word being degrading, etc.
I heard the sixth book is going to be released this summer and that she already had the book written. It was on some interview that she went to a file cabinet and grabbed a wicked thick one that was taped saying that it’s already finished. Could be wrong because I’m going on a friend’s word.
I think J.K. will definitely elaborate more on the veil issue because it's not like her to leave something like that unexplained. Maybe when Harry returns to Hogwarts, he'll start to become obsessive in finding out information on the veil. He may also start distancing himself from Ron and Hermione because of what happened in the Ministry.
Harry will probably be made Head Boy because Dumbledore wanted him to be Prefect in the first place, but because of all the problems, he gave it to Ron.
I have no idea who will be the new DADA teacher. It may be someone new because she brought in Umbridge.
As for who Harry will end up with, I believe it will be Hermione. Yes, there is tension between Ron and Hermione, especially about Krum, but in the 5th book when Ron brought him up, it was written, ‘"Ho, ho," Hermione replied in a bored fashion.’ Harry also protected her in the Ministry by grabbing her robe to make her run faster, which Ron didn’t do and from the Imperius Curse. Rita Skeeter and Cho thought there was something more going on between Harry and Hermione. Hermione even told Harry to tell Cho that he thinks she's ugly, but he was quick to respond that she wasn't. Also, J.K. was quoted with saying something about Harry seeing something in a new light. It’s vague and could mean anything.
For argument’s sake, to go along with Ron going to the ‘dark side of the force,’ Harry and Hermione get together. Ron’s already mad that Harry is basically everything he wants to be (i.g. rich, famous, natural at Quidditch, gets the girl, etc.), Draco or some other evil person could persuade him to go against Harry. Never know.
If J.K. said they're not going to be Animagus, then they're not, but if they were, I sincerely doubt that Hermione would be an Otter.
That’s my two cents.