Better Call Saul is a spin-off of Breaking Bad.
Ever since Better Call Saul was announced, fans wanted to see Breaking Bad characters on the show.
Breaking Bad creator Vince Gilligan wants to see Walk and Jesse on the Better Call Saul as well.
According to Uproxx, Gilligan "desperately" wants to see Walk and Jesse on Better Call Saul.
---I desperately want to see both of them on Better Call Saul. The writers do, the actors do.