DN's plot is getting ridiculous and fanservice is starting to really bug me. I hope they won't ruin the cool concept. Light ( which is by the way a stupid name ) was an interesting character because of his wickedness. And now if wickedness is gone permanently...
Edit: Yep, I know, Light have most likely planned something to figure out his old self. Perhaps left some clues to buried DN. The question is what will he think about his old self.