“In the spirit of full disclosure, Walt and Jesse will not appear in season 1,” Gould said at the Television Critics Association press tour in Pasadena. “Having said that, everything else is on the table.”
“The short answer is: The sky is the limit and any of these characters could conceivably show up in future seasons,” Gilligan added. “But the intention is it will feel proper and organic, because if it feels like a stunt then something has gone terribly wrong in the writers’ room. Jesse will be tricky, because he’s so young [during the timeline of the prequel]. To be completely honest, I want to see them all eventually. There’s a constant tension of, ‘Man, this would be fun to do, but would it just be a stunt?’”