'The Hobbit' still waiting for the green light

[Tuor in Gondolin]

They are diverging from the books a bit to give Gandalf more backstory with the Necromancer. So they are adding to it, but not taking away. Jackson assured us that all 13 dwarves will be in the story, and they will stick as closely as possible to the original events of the book.

That's a reasonable change. But after some of PJ's "liberties" with LOTR
I'm rather skeptical. Presumably Elrond, Galadriel, and Saruman will be
worked in (will Christopher Lee still be too ticked off with his character's
treatment to reprise his role?). And, of course, he could age Aragorn about
10 years to have Arwen and Aragorn appear.

And most important, what will his Hitchcockish cameos be?
One of the Master of Laketown's lackeys?