I do not think that Stefan will hurt Elana! I am not sure what they will do, but I think that Katherine will have a part in it. However, if you have read the books, Elana does actually die and comes back. Granted that happened in season 2 and they are not following book, but I do see a lot of what has happened in the books just in different sequences and different people. I just cannot wait to watch it. I love this show and all the cast.