It already stated in the 6th book, that Harry, Ron, and Hermione would not be returning to Hogwarts School of Witchcraft and Wizardry. Therefore predictions must be made in a setting outside the Hogwarts grounds.

I also believe Harry, Ron, and Hermione may be going after Voldemorts final horcruxes. However, I think Harry will hunt down Snape before anything and kill him.