If it ends dark like episode 3 then I think it would be better. However if it gives an ending like episode 6 then we may have a few problems?..... If the main villain happens to be a dark jedi or Sith Lord and they are killed at the end of episode 9 I don't think this time we'll believe that it's over and that balance has been bought to the force!! Having a dark Jedi or Sith Lord in the ST also weakens slightly the whole OT story of good v evil? I bet whoever came up with the story/idea for this ST was racking their brains out for ages!