Better Call Saul's season finale, left fans wondering if we will see Jimmy transforming into the ruthless lawyer, Saul Goodman in season 2.

In the season 1 finale titled Marco, Jimmy walks away from a job offer at a law firm, and vows to Mike (Jonathan Banks) that his days of playing the game straight are over.

The camera shows traffic lanes on the pavement making a nod to a second season, which is poised to introduce a more ruthless version of Jimmy.

Bob Odenkirk teased fans during an interview with TV Insider, about some new themes that we will see in season two.

He said, "I don't know what's going to happen, but based on the very brief and very general conversations I've had with Vince and Peter, I think Jimmy's got some ups coming his way and some good times, which could be fun to watch."

Here are a few things we know of the show's upcoming season

Jimmy and Chuck's relationship

Jimmy walked out on his brother Chuck, who betrayed him, and tells him that he is not cut out to be a lawyer. "You're not a real lawyer! Slippin' Jimmy with a law degree is like a chimp with a machine gun."

The finale episode saw Jimmy stopping by Chuck's place, asking about his whereabouts, and making sure he was doing okay, and then driving away. Will the brothers ever reconcile?

After the finale, Odenkirk told Variety that he doubts the relationship will ever fully recover.

"I don't think it can be fixed. I do think that depending on what happens to Chuck, the two brothers can reconnect and acknowledge that they care about each other and love each other and that they're victims of their own egos," said Odenkirk.

"When people say words like 'fixed,' there's always going to be a deep shadow of pain cast by what happened in the first season, that inability of Chuck to believe in his younger brother and give him a chance to be respected. I think that's never going to go away."

Breaking Bad stars will guest star

According to rumours, Breaking Bad star Aaron Paul, will appear in Better Call Saul season 2.

Aaron Paul not only said he watched Better Call Saul in an interview with Variety, but also that he hopes to make an appearance.

He said, "Yeah, we always have fun having that discussion, (executive producer) Vince (Gilligan), myself, (executive producer) Peter (Gould), the writers. We just have no idea how that would happen. But hopefully one day."

Breaking Bad executive producer Michelle MacLaren also told Variety that she'd like to see Paul and Bryan Cranston make a cameo on the prequel series.

"Who knows what they're gonna do, but it is a prequel, so [Paul] absolutely could," MacLaren said. "I think it's open to whoever Vince and Peter decide to bring in. I would imagine that everyone who would ask would say yes, but I have no idea what they're going to do with it."

Bob Odenkirk also wants to see some characters from its parent series in the show.

He said, "I hope to God that happens. It's so nice to hear the positive willingness of Aaron Paul and Dean Norris to consider that."

Jimmy transforms into Saul Goodman

By the end of Better Call Saul season 1, the fans saw him on the trajectory of becoming the criminal character that fans loved in Breaking Bad.

Executive producer Peter Gould previously teased Jimmy's big choice and says he is getting one step closer to Saul Goodman.

In the AMC preview video, creator Vince Gilligan says Jimmy will keep his promise to Mike in the finale, to discard ethics, as fans watch him "getting that much closer to becoming Saul Goodman."

"He is going in a direction towards moral grayness," adds Peter Gould.

Jimmy will leave Kim behind

Turning down the job offer at the end of the finale could be the last nail in the coffin for Jimmy and Kim's (Rhea Seehorn) friendship and a possible romantic relationship between them.

Will Jimmy get together with Kim? Bob Odenkirk doesn't think so.

Odenkirk told Variety, "I have mixed feelings. I want him to get together with her. But if she can't support him... I love Rhea Seehorn, but I don't like the character seeking so much approval from people who aren't giving it to him."

"At a certain point you want that person to have some dignity and walk away from people who aren't going to get behind him."