Ok, let's consider for a second the sets we've already gotten. From the 7 sets that LEGO has released up until now, the only repeated minifigs have been Harry in Hogwarts uniform, Harry in casual wear, Ron in Casual wear, Hermione in Hogwarts uniform, Hagrid, Lucius Malfoy, and Fenrir Greyback. Besides that, every minifig has been exclusive to the set they're in. The point is, I think it highly likely that we will see many brand new minifigs, and little repeats besides the trio. And frankly, who doesn't want that?? I think it's likely that a new "creature" mold will be made and be used in both the Forrest set and Battle of Hogwarts set, probably a centaur or a giant. Like Ravenclaw 2010 said, the Battle of Hogwarts will probably not be bigger than the Burrow, so we might get 7 figures at the most.