kid dies after the opening downgrading kratos to his former self
I know you are kidding but for those who don't know, The Kid is a big part of not only the story but also the combat. There is button specifically for The Kid and he can be used to take some heat away from Kratos. And Judging from the trailer, all the Experience points go to the Kid, although I think Cory said that they both have separate upgrade trees.