And married to Harry...
Luna and Harry? Conceivable. . .even likely. She is the only one that makes him feel better at the very end of book five, and that is an important clue!
The Ron/Hermione match is being foreshadowed perfectly as well.
I gotta say, the thing I look most forward to is Fred and George's prank overload in "Order of the Phoenix" when that comes out on film. Rosie O'Donnell can play Umbridge.