Fucking greed.
There's nowhere to go. They ended that show, period. Everyone either wound up dead, outed and/or cut off. Jesse has nobody to run from or to and honestly, can you REALLY see him getting back in the game?
Who is gonna cook the meth?
Who is left to even have a hard on OR the capitol to do anything about it? Gus --dead. Cartels --dead. Nazis --dead. Walt --dead. They're all fucking dead man!
Gang dynamics? They're all dead or broken up.
This is just greed, make a movie, call it that to get way more viewers, laugh all the way to the bank.
Show was one of the best ever made, period, and I think they ended it the way they did to prevent this kind of crap. Now if they wanna reboot it? Too soon I think, but it makes more sense than a movie. They COULD do a prequel, but they're all old and the show had the prequel built in.