Oh, I don't mind spoilers at all. I prefer to know things in advance, in fact. But again, I'm the person who reads the ending of a book first, so...

I guess they use fire because it looks good on screen, though. ;)
Morgause killed off? Well, that's good news. Although I chose a more interesting end for her in my Epic Fic (TM). Now all I need is to actually write it, hehehe.