While a total reboot of The Expendables franchise doesn't seem to be on the cards (yet), the best way to do it would be to unite classic action movie characters. The Expendables was Sylvester Stallone's follow-up to the success of both Rocky Balboa and 2008's Rambo. Expendables famously united a group of action movie actors like Stallone, Jason Statham, Jet Li, Dolph Lundgren and many more. The movie was sold on this all-star pairing, and while The Expendables received mixed notices overall, it was a sizable hit.
The Expendables 4 is set for release in 2022, which reunites some familiar faces with new cast like 50 Cent and Megan Fox.
Time will tell if The Expendables 4 revives the saga, however. The entire appeal of The Expendables has been seeing the likes of Stallone share the screen with Jean-Claude Van Damme, Arnold Schwarzenegger or other icons of a certain era. While the films are undemanding fun at their best, they've also never matched or lived up to the best work of any of the assembled cast either. If the series ever hits the reset switch, one direction The Expendables could go is to unite a group of classic action movie characters, instead of actors.
Since Stallone created The Expendables franchise in the first place, maybe the most obvious choice for leader would be Rambo. He already lead a team of mercenaries for a rescue mission in 2008's Rambo, and it was a line of dialogue from the second movie where he called himself "expendable" that gave the series its title. From there, there's no shortage of characters that could sign up - so long as there's a semi-credible explanation for their union. Statham's Frank Martin from The Transporter could sign up, or alternatively Statham's assassin character Bishop from The Mechanic movies. Since Rambo and Bishop are both characters owned by Millennium - who produce The Expendables saga - they seem like a good place to start.
Millennium owns the Undisputed and Ninja movies fronted by Scott Adkins too, and while either would be great picks, explaining why Bokya is ing with mercenaries is another task. Extending beyond properties owned by Millennium, Uma Thurman's The Bride from the Kill Bill duology, Arnie's Dutch from Commando, Van Damme's Chance from Hard Target or Chow Yun-fat's Tequila from Hard Boiled would all make for a killer unit. Fans of The Expendables have always wanted to see the likes of Kurt Russell, Jackie Chan, Michelle Yeoh and many more the series, but having them reprise their most famous roles would be a rights issue nightmare.
Assuming the actors involved are even willing to return to these roles, Millennium would then have to negotiate with other production companies for the crossovers to happen. While shared universes are becoming more common thanks to the MCU and its sorted offshoots, a more grounded series like The Expendables - which Jackie Chan has avoided ing thus far - adding a roster of famous characters is much trickier. Still, if The Expendables 4 doesn't hit with viewers, it's certainly one option would considering for a reboot.