Any theories for harry potter and the deathly hallows?

All I know is Harry will die hands down. There's no way he won't. Its the last book she can kill him if she wants too. I think that there is a chance that Harry and Voldemort could both die. I think that some of the more minor characters will have a more major role. I also think the hagrid won't make it till the end a probably if I had to say Ginny Weasley won't either. Thats just my quess. I don't know but I can't wait to find out.