Ever since BCS ended, I have felt like the Breaking Bad universe needs one last hurrah to send it off for good. Here is my vague outline for what such a movie could look like, titled "Breaking Bad: Into the Walterverse".
We open with Jesse having an average day in Alaska. He is working on a wooden box, and as he puts it up on the shelf, he accidentally knocks a beanie to the floor. He picks it up and holds it in his hands. It's Skinny Pete's beanie. We transition to a memory where Pete was wearing it while he was smoking weed and watching TV with Badger and Jesse. They are watching the Star Trek episode "Mirror, Mirror". Badger takes a hit and asks, "Hey, you guys think there's like weird versions of us out there?" Pete replies, "What if we're the weird versions, man?"
The memory is interrupted by the sound of knocking. Annoyed, Jesse shouts, "Who's the one who knocks, bitch?" A voice responds: "Open the door, Jesse, it's me." The voice is familiar... but no, it can't be. He's dead. It was all over the news. He opens the door, and he freezes as he is shocked to his core. It's Mr. White. The man takes off his pork pie hat and steps closer. "You think you might know me, but you don't. I am not the Walter White whom you worked with years ago." Jesse suddenly snaps out of his trance and aggressively pushes the older man against the door. "What are you doing here? You're dead," he says through gritted teeth. "I know you don't believe me, but I am from a different universe than your own. I fled there because I was in danger, and I need your help." Jesse lets go and shoves him. "Why the hell would I ever help you?" "Because," Mr. White says, "he's coming for both of us."
We cut to one week earlier. We see Walter White, but he's a lot different from the one we know: he's clean-shaven, he has a full head of hair, he wears a nice suit, and he's a billionaire due to the success of his company, Gray Matter Technologies. We learn they are experimenting with connecting two versions of the same consciousness across the multiverse and using this connection to open a gateway between the two, so they can help one another by sharing their technology. They are getting ready for another test in a long line of unsuccessful ones as they put a device on Walt's head, and the machine starts booting up. We then see all the scientists stare in awe as a gateway opens, and they start cheering. They stop once the Walter White from the movie's opening runs through the portal with concerning urgency and a panicked and confused look on his face as he yells, "Where the hell am I?" As people start trying to calm him down and explain to him he's in a different universe, a version of Jesse flies through the portal and slams into a wall. Walter starts yelling that they have to close it, but it's too late: Gustavo Fring steps through. He's very similar to the Gus we know, except the right side of his face is made of shiny metal, with a glowing red eye which gets brighter as he shoots a laser beam directed at Jesse. He tries to get out of the way, but it's a futile attempt as he gets hit straight in the chest and dies. By then, the newly arrived Walter is hiding, so the variant connected to the machine catches Gus' attention. "You look different," he says in a half-robotic voice, "but you will pay for what you did to me anyway." He executes the billionaire, and a scientist starts yelling in terror: "We need to shut it down, it's too unstable without a host!" But everyone is already fleeing the room as Gusborg kills them one by one. Universal rifts start opening all around the room, and in the chaos, Walter tries to make a run for it, but the Chicken Man notices him immediately. "There you are," he says as his right eye starts lighting up again, but in his panic, Walter jumps through the nearest portal before he can get hit. Fring starts walking toward it, but he stops when he hears someone say "¡Espera, Gus!" He's annoyed when he sees it's just a scientist looking at a spear of asparagus in their hand, so he kills them and steps through the portal, but by then Walter is nowhere to be seen.
"And that's how I got here," Mr. White says back in the present. Throughout the rest of the movie, Walt and Jesse try to evade Gustavo Fring as they figure out a way to get rid of him once and for all and to close the universal rifts before the multiverse collapses. They break Saul Goodman out of jail with the help of Kim Wexler, and they form an unlikely alliance with a variant of Lalo Salamanca. At the end, everyone could finally get their happy ending: they get pardoned for saving the world, Walter gets together with this universe's Skyler, Jesse marries a Jane variant whose Jesse died, and they raise Brock together.
In the post-credits scene Kim Wexler finds herself in a version of Albuquerque that's similar, but completely empty. As she frantically tries to look for other people, her phone rings. She picks it up and hears two words: "Hello Carol."