Fring’s own evolution into a drug kingpin was outlined somewhat in Breaking Bad, and Better Call Saul will perhaps fill in some of the gaps of that transformation as well.
Better Call Saul chiefly concerns Jimmy McGill’s transformation from “Slippin’ Jimmy” the con artist to Saul Goodman the smooth and unscrupulous lawyer.
In Vince Gilligan’s Breaking Bad/Better Call Saul world, slow evolution of character is what it’s always all about.
Watching Bob Odenkirk, Jonathan Banks and Giancarlo Esposito working together again should be a joy.