Wouldn't be Chapo unless the story skips ahead by about a decade. Chapo was around in the mid-late 90's (where Season 3 left off) but it's the Juarez Cartel that was the biggest then, then the Gulf cartel after they fell off, and then Chapo and the Sinola Cartel took the game over in the mid-00's. Skipping to Chapo now could be playing themselves. It'd be fire, but there's nowhere else to go really in the line of succession.
Fuentes (the cartel dude Pacho was linked up with) is a highly interesting and entertaining person in his own right, and plays an incredibly important role in the history of narcos. The way dude died is downright James Bond fukkery
. Juarez was peaceful while he was running the game. Fuentes and the Juarez Cartel collapsing is what turns Mexico into the drug trafficking war zone we know it as.
Because after that, when the violence breaks out, the Gulf Cartel siezes control through their partnership with Los Zetas (rogue Mexican military turn mercenaries) which is a crazy story in and of itself, and you get Cardenas as a don who pulled up the FBI and DEA in broad daylight and held them hostage on a public street
After that you got the war between Los Zetas and the Gulf's, and Chapo undermining them both to seize control for the Sinola Cartel.
There's so many insane stories to tell before Chapo I hope they don't skip there just because his name is buzzing. Look at Season 3, was the best even without the famous name of Escobar involved.