I think it’d be cool if Walt and Jesse could have a short role in the upcoming season - even if it’s a cameo.
I can picture both of them walking on the street and Saul heading towards them - both parties totally unaware that they’ll soon be meeting.
Or something like the end of Star Wars: The Force Awakens when Rey walks up that hill and Luke Skywalker turns around and looks back at her.
The very best such cameo appearances were hilariously done on “Last Man Standing” with various “Tool Time” cast popping in. The dialog was hilarious.
Hard to believe Tool Time ended almost twenty years ago.