'the two towers' cliff-hanger

I suppose I can understand the reason for the reported move of Shelob from "The Two Towers" to "Return of the King," but I am a little disappointed. The last pages of "The Two Towers" the book is one of the all-time greatest literary cliff-hangers. The first time I read it, it was much like the same feeling I had when I heard this dialogue:

Riker: What do you mean he's with the Borg?
Worf: He is a Borg!
Picard: I am Locutus of Borg. Your lives as you have known them are over. From now on you will adapt to service us. Resistance is useless, Number One.
Riker: Mr. Worf ... fire.

TO BE CONTINUED ...

And they knew they were doing it too.

I wish Jackson would leave Shelob at the end of the second movie, but I understand why he's not. The wandering in Mordor isn't likely to be appealing enough to support a big chunk of "The Return of the King" in the cinema. But he would get a lot of Tolkien newbies rushing out to buy the books and to see his movie if he did it that way.