7. RAB is, supposedly, dead.
(For the record, I have not the faintest doubt that Severus is and was always Dumbledore's man.)
Hmmm..., after further review, R.A.B. will not be the D.A.D.A. professor. And furthermore, while it is possible that he may not be dead, I put that into the same category as the speculation that Dumbledore isn't dead.
On the other hand, I have some better quality speculation about the locket that I will save for another time...