Breaking Bad set up Better Call Saul from the time of Saul's first scene with Walt, which references the backstory of Jimmy McGill.
Saul Goodman, or Jimmy McGill, is one of the best characters from the Breaking Bad universe. The Albuquerque lawyer may be shifty, but audiences consistently fall in love with Saul Goodman time ...
Originally, Vince Gilligan wasn't completely sold on the idea of centering an entire show around Saul Goodman.