1. There will be 9 episodes. Some sites say 10 and that was the plan but there will only be 9.
2. This version is based on the uncut version of the book. This is probably the case since they were going to include the character ”The Kid” who only appear in the uncut version.
3. The show will have a new ending. Well...there will be a continuation of the story. King wrote the last episode and is telling us what happened after the book ended. So not a new ending but a very interesting continuation of the book. Here is what creator Josh Boone say about it:
“King wrote us a lovely coda, which is sort of the story he’s wanted to tell for a long time that takes place immediately after The Stand that provides an additional resolution for Franny, who’s sort of not involved in the climax of the book, which I thought was really, really brilliant and a deeply moving script. I was so moved to get to go make it.”