They both retire from the game and live happily ever after.
Walts days are numbered. Hank is on his ass after making the Gayle Bettiker connection. Walt could lie and say that he just did the chemistry design work for $500,000 because he needed the money and was going to die anyway. That might back off Hank, but I doubt it. Walt could live, but he will be on the lam. We do know that at some point next season Walt is in New Hampshire living under a new identity.
Jesse's fate is much more interesting, IMO. Does he get back in the game with Walt? Does he figure out that Walt poisoned Brock and get revenge?
Does Hank tie Jesse to Walt? I think so. Does Jesse flip on Walt?