4. Krazy-8
"Better Call Saul" is going to need a villain or two and if we've got our chronology right the smart money is on it being Krazy-8 (Maximino Arciniega) in the prequel. Krazy-8 was the main antagonist for season 1, and was the most-feared distributor on the street before his successor Tuco ever turned up. There is plenty of scope for Krazy-8 to return given that he has quite a rich back-story, as revealed shortly before being strangled to death by Walter White. Before he got into the drug-trade business, Krazy-8 was a university student and got a degree in Business Administration from the University of New Mexico. He later worked with his uncle in a furniture store and wrote jingles for the company's adverts, but ended up taking a wrong path in life before ending up on the drug scene. But there was plenty of good in him before all that and we'd like to see this explored a little bit more in Better Call Saul.