'Better Call Saul' fans have mixed feelings over Bryan Cranston and Aaron Paul finale cameo

Breaking Bad leads Walt and Jesse have been confirmed for an appearance in the final season of Better Call Saul - but fans aren't sure whether to welcome the news or not.

Better Call Saul, which features Bob Odenkirk as his Breaking Bad lawyer character Saul Goodman (real name Jimmy McGill) in a prequel series explaining how he came to be the go-to attorney for Albuquerque petty criminals, is due to air its final season on Netflix this month.

Read more: Bob Odenkirk warns of 'bloody and painful' Better Call Saul finale

A question that has long been on the lips of fans is whether the storyline will take Saul up to his days working with Walt and Jesse - and comments from the show's co-creator Peter Gould at PaleyFest LA seem to suggest that it will.

He told a panel about Better Call Saul: "I don’t want to spoil things for the audience, but I will say the first question we had when we started the show was, 'Are we gonna see Walt and Jesse on the show?' Instead of evading, I’ll just say yeah."

Gould also told Variety: "How or the circumstances or anything, you’ll just have to discover that for yourself, but I have to say that’s one of many things that I think you’ll discover this season."

But Jonathan Banks, who plays Mike Ehrmantraut in both shows, voiced fan concern as he said at the same panel: "Aaron Paul is like 50 years old — he's playing a 20-year-old? I want to know where you guys set the bar."

Read more: Bob Odenkirk says he lost his memory following heart attack

One fan tweeted: "Cannot stop thinking about 42 year old aaron paul playing 17-18 year old jesse pinkman on better call saul this year."

However, someone else tweeted: "I almost can’t believe that they’re actually bringing Walt and Jesse back for Better Call Saul Season 6. It was always a possibility, but I never thought they’d actually do it. Can’t wait to see how they connect these two phenomenal shows. My hype is through the roof."

Walter White (played by Bryan Cranston) was a high school chemistry teacher in Breaking Bad who was diagnosed with cancer and, unable to cover the cost of treatment, turned to making crystal meth with the help of troubled ex-student Jesse Pinkman (Aaron Paul), escalating to becoming drug dealers wanted by both the FBI and various dangerous cartels.

Some fans began sharing what they would like the appearance to involve, as one person tweeted: "It'd be funny if the Better Call Saul finale was just a re-run of the first episode where Saul meets Walt and Jesse from Breaking Bad, which is actually one of the best episodes of Breaking Bad."

Someone else wrote: "It'd be funny if Walt and Jesse are shown in the show not as drug making partners but rather in a teacher- student way before they decided to work together."

But not everyone was pleased about the spoiler, as one fan tweeted: "Why would you tweet this and ruin a huge surprise for viewers? Come on."

Someone else agreed: "Really wish I didn't go on twitter today. That's a massive spoiler. I know it was logically going to happen with BCS being a prequel, but I still would've preferred to see it live, not told beforehand on Twitter."

Better Call Saul's final season begins streaming on Netflix on Tuesday, 19 April.

Watch: Better Call Saul's final season trailer