Yes, but according to people I know who have read the books, the author makes you love the person and then he kills them off. So since the show follows closely with the book, anything is possible.
I'm just waiting for lil Arya to become an assassin. That will be fun to watch. She's gonna be a awesome little badass.
Just a thought, think back to all this drama, and how different it would have been if Joffrey had actually spared Ned's life back in Season 1. Just gave him a demotion, told him to mind his words or he would be hanged, and let him go back to his family.... ooooo the possibilities lol