New Headmaster/Headmistress at Hogwarts in Book 7? new heads of the houses?

[minerva_523]

No: HPFGUIDX 153802

> Kathrin P said (concerning who may replace McGonagall as head of
> Gryffindor):
> > Madame Trelawney? Gosh, I hope not! She seems more like a
> > Ravenclaw to me...
>
> Panhandle:
> Trelawney? Ravenclaw? I cannot think of any single character who
> would be less a Ravenclaw than Trelawney!
SNIP

Now Cacaia:
Back to Gryffindor, for a moment- The initial question of who will
replace McGonagall as the Gryffindor HoH has kind of stuck in my brain
ever since I finished reading HBP- The only one I can think of is
Hagrid- He was a Gryffindor, right?!!!
And what about Slytherin? Who's to be HoH there? Slughorn was pulled
from retirement as a mere "fill-in" for a year- Surely he won't want
to continue teaching?!
What do you think?

Cacaia