Yu Nan, Arnold Schwarzenneger Posters Herald 'The Expendables 2'

The first character glimpses from Sylvester Stallone's "The Expendables 2" welcome back Arnold Schwarzenegger and welcome to the fold the deadly Yu Nan.

The posters revealed today by IGN and Coming Soon show off both packing serious heat and looking like Serious Business. Schwarzenneger will reportedly be reprising and expanding his 2010 "The Expendables" cameo as Trent Mauser, a rival mercenary to Stallone's Barney Ross - and probably more than a litte bit of a wink at the two once being Hollywood action-flick rivals but having developed a mutual respect for one another.

Nan, on the other hand, joins up as Maggie, a new addition to Ross' team along with "The Hunger Games" star Liam Hemsworth as sniper Billy The Kid.

Stallone's big-budget sequel also features returning friends and foes - once more, with some of the finest action-movie monikers ever devised - Jason Statham, as Lee Christmas; Jet Li, as Yin Yang; Dolph Lundgren, as Gunnar Jensen; Randy Couture, as Toll Road; and Terry Crews, as Hale Caesar; and Bruce Willis, as Mr. Church.

Seriously, half the fun in these movies is in describing them to someone, complete with the characters' names.

Also joining the fray this time will be no less than 50 tons of roundhouse kicks in a five-pound bag: this one throws liberal doses of Chuck Norris and Jean Claude Van Damme into the mix. Van Damme, as the primary antagonist, is actually named "Jean Vilain."

If you're not excited for August 17 yet....