I just hope Mr Jackson includes the "Cleansing of the Shire" at the end of ROTK - four armor-clad, battle-hardened Hobbits return home to find the Shire a socialist-style dictatorship Unfortunately, he doesn't. He said that, early on, the Scouring of the Shire was out; that he felt it never made sense as a part of the movie presentation -- one reason being it would have made the movies too long. I think he, or one of the main movers in the filming project, even said he didn't like it in the book. Sad.
The Scouring is probably out -- but I'm hoping PJ might surprise us. I think he said something earlier this year about the ent attack on Isengard would not be shown in the TTT.