Knight, I would add to your list of possible EE material the confrontation with Saruman at Isengard (which we have been promised) and also the confrontation with the Corsairs at Pelargir (as I believe that more Corsair material was filmed). Any possibility of the Druadan making an appearance, I wonder. I know that Ghan-buri-Ghan appeared on some early cast lists, but I'm not sure that any material in this regard was actually filmed.
Oh and, of course, hand-in-hand with the Houses of Helaing scenes goes Eowyn and Faramir's romance.
