That's the main thing I'm wondering about. Leaving the story hanging with Frodo "dead" would be pretty rough, especially as there are plenty of people who have never read the books and wouldn't know. They didn't change the fall of Gandalf, so who knows?
Sam's reaction is going to make me cry one way or another, I'm sure. Poor little guy!
And then the camera zooms into the look of horror on Sam's face. Quick get PJ on the line!