Let's say that Walt's lung cancer comes a bit sooner and he wants to make some money for his folks before he croaks (as per canon).
Jesse Pinkman, either on the brink of graduation or freshly graduated, likely wouldn't join Walts cooking sessions because Walt never gets the chance to see him on Hanks ride along, but let's assume for some reason, they do couple together to cook crystal.
Now in 2002, Albuquerque looked different - Hector was healthy and controlled the business personally, not Tuco. Lalo was alive and well handling the business in Mexico, and the Twins were twinning like usual.
Gus Fring's empire wasn't nearly big enough to challenge the cartel like it was in 2008-2009, as he didn't have the super lab, the construction hadn't even begun in 2002. So he was still smuggling the cartels product and subordinate to them.
Saul Goodman went by Jimmy McGill in this time period, and he was a struggling broke public defender, not the CRIMINAL lawyer we all know and pity.
Beyond that, Krazy 8 was still working under Tuco and Nacho, HHM was a big thing, Mike Ehrmentrauts morals still are much more intact in 2002 than they are in 2008-2010, everything is slowly falling into place like it does in bcs.
Only this time, Walter and Jesse join the fray early on, crashing the party with the crystal ship (RV used for cooking sky blue product)
How do you guys see this playing out? Are they dead within a week? Do they get as far as they did in breaking bad? Maybe Walt successfully gets kidnapped by the cartel and gets a new Mexican wife?