I was a bit intrigued when I saw the TV ads for this film as Arnold Schwarzenegger is in it but he's still governor of California. So I did a bit of digging around on the IMDB website and thought I would copy this extract from the synopsis which gives nothing away.

Barney Ross (Sylvester Stallone) is a man with nothing to lose. Fearless and void of emotion, he is the Leader, the Sage and the Strategist of this tight-knit band of men who live on the fringe. His only attachment is to his pickup truck, his seaplane and his team of loyal modern-day warriors. His is a true cynic who describes what he does as "removing those hard to get at stains". The team behind him is made up of Lee Christmas (Jason Statham), former SAS and a savant with anything that has a blade; Yin Yang (Jet Li), a master at close-quarter combat; Hale Caesar (Terry Crews), who has known Barney for ten years and is a long-barrel weapons specialist; Toll Road (Randy Couture), a skilled demolitions expert and considered the intellect of the group; and Gunnar Jensen (Dolph Lundgren), a combat veteran and an expert in precision sniping who struggles with his own demons.

Those are the 4 main characters with Stallone (who alos directied this) and Statham being the two main leads.

Arnold and Bruce Willis appear in cameo roles and are uncredited in the film's credits.