Instead of France, Officer Liu is sent to UK to tangle with the local underworld. At some point he crashes in on Bart (without back-up, since real action heroes handle their own biz). Bart is a bit startled at first by the odd resemblance between the cop and his pet enforcer but quickly snaps out of it, unlocks the collar and tell Danny to "kill".
Takes place in Bart's warehouse. Furniture, mannequins and various other random crap abound. No other mooks present.
Since Danny has home field advantage and the possibility of Bart stepping in, I'm sporting Liu Jian his acupuncture needles.
Alternate version a) the gladiator pit from DtD with the medieval melée arsenal. This is still a scenario, so no bloodlust.
Alternate version b) Khazan. No weapons.