Horse hockey. The only thing I hear about that movie is "Oh my god, when is the real ending going to happen?' There's only 4 endings to that movie right? There's Frodo waking up, there's Aragorn's coronation, there's the return to the shire and Sam's wedding and then there's Frodo's goodbye.
Look, I UNDERSTAND the point of all this. I thought it was really well done. But by the time the movie really, really ends, it's like a half hour from the climax of the film... The climax is the climax... It's the pinnacle. It's supposed to be the culmination of the entire story. Keeping the audience in the theater that long after the climax just doesn't make sense. You've already cut out the scouring of the shire, why do we need to see Frodo go back to eventually leave? Why do we need to see Sam marry bar wench? It doesn't matter. Yes, it's nice closure, I don't disagree, but save it for the extended edition.
You have the audience's adrenaline pumping after the massive battle and Frodo's own battle with himself. You see Frodo being saved and waking up. You have the coronation, where the line of kings is restored and he gets the girl. Then, he recognizes the Hobbits and they basically just say 'Hey, we're all here because of you.' The camera pans out and you see the entire crowd and the music is playing and fade to black and CREDITS!
The perfect place to end the film. Send your audience out on a high note for a movie like this. Just because the ending is dark doesn't mean it's "quality cinema". The movies are great, wonderful adaptations of a book. But, when you make a movie, you need to accept that you're making a movie.