Totally guessing here, but I feel like it might be a time-jump thing. I don't know how they'd do it any other way. I always liked how they met for the first time in Breaking Bad, with Jesse telling Walt about him, etc. -- so I hope they don't do something stupid, like set up another "unofficial" way they met.
It'll probably be like how they did it El Camino with Walt. I've only seen that once right when it came out so I'm fuzzy, but that was a time-jump if memory serves. That was a flashback though, much easier to execute. Maybe Gene has a flashback with them; that would be the easiest way.
Either way, I'm not a fan of bringing back Walt and Jesse in BCS. I just think it's completely unnecessary.
Before they filmed this season, gilligan made a good point and suggested jesse showing up would be almost a certainty.
His justification was that Jesse was aware of saul and pointed Walt his way.
It is entirely possible given Saul's volume and Jesse's past that Jesse had used him before.
When saul first sees walt and Jesse together, it is the ski mask scene where saul thinks it is Lalo's people and blames things on nacho- seeing some dealer he had worked with before would be secondary to realizing what Walt wanted for badger and why.
I could buy a saul and Jesse scene.
If it is a plot element with Walt and Jesse, there has to be a jump.
If there isn't, the time frames are being reconfigured.... the timeline is pretty clear on the fan page we are a couple years before walts entry in to crime.
Or.... it is just a fan service bumping in to Walt at the store or some shit.
Just to float a possibility, and to reference Cranston and Paul's interview, I am thinking it will be an expansion of an existing BB scene.
They mentioned they were brought in to a private part of the airport and picked up "2 steps from the plane".
They were housed in an air bnb and not allowed to leave- makeup and "wardrobe checks" were done in the house, they were driven in for their scenes with no waiting time and left immediately.
My guess is they had to match wardrobes to a scene in BB and that a photo of them in those clothes could probably point to the episode it was from.
All I know is I am really curious. If they are worked in to the plot for an episode in 8 days, then a shit ton of action is going down tonight.
Another wildcard possibility is some sort of episode lead in with walt/jesse/saul/cabdriver scenes setting up genes conclusion.
Since they recast the cabbie, and since he would logically know that saul is a wanted fugitive, there is quite a bit more to go on that front.
I am really looking forward to these next few weeks.
The final few episodes of breaking bad were one bombshell after another, with each storyline getting its own fulfilling close, I am hoping this is the same- each week a finale of its own.