My breaking bad theory
>Walter, Mike and Jesse all sell their portion of the methylene, except walter sells himself over to the other gang (or something like that)
>Walter Jr. Kills himself (for some reason regarding stress? Crashes his car? Something like this.)
>Walkter blames skyler, and chokes her to death (fore-shadowed by Sky's sister [watch the scene where she says "Teenagers, sometimes you just want to choke them." Notice her hand casted directly over Skylers neck, intentionally with the camera angle])
>Walter realises he is fucked, and talks to sal about the "premium disapear package" or w\e
>Walter has his birthday for the second time. (end of the least episode)
*SPOILER ALERT*
Walter Jr is a ******. He gets a brand new sports car and is angry as fuck because he has to live with his aunt. Like holy fuck, gimme that shit and I won't complain if I had to sleep on a fucking public bench.