Here are some ideas for you're stories to get started -
- Pick up at Season 2, but make it an alternate Season 2 and have it to where Jesse indeed did die in the season 1 finale, have one of his friends be Walt's new partner, or have Walt search for a partner and find someone else.
- Have it to where they failed to kill Gus and he "owns" them.
- Have a version where Gus or Victor never died, and they later come in handy, but if you choose Gus not dying, their may be some serious consenquinces for Walt.
- Have a version where Hugo never got arrested and is making trouble in the school, maybe Walt has to kill him with sciene powers.
- Have a version where Ted gets Skyler pregnaut and Walt has to "Take care" of it.
- Have a version where Mike doesn't get killed.
Anything you want, feel free to add ideas!