The stars in "Bullet to the Head" include Christian Slater (left) and Sylvester Stallone. | Warner Bros. Pictures photo
"Bullet to the Head" features Jason Momoa as Keegan. | Warner Bros. Pictures photo
Sarah Shahi plays Lisa Bobo in "Bullet to the Head," which also stars Jason Momoa as Keegan. | Warner Bros. Pictures photo
Sarah Shahi stars with Sylvester Stallone in "Bullet to the Head." | Warner Bros. Pictures photo
Walter Hill (from left) directed "Bullet to the Head," which stars Sylvester Stallone and Sung Kang. | Warner Bros. Pictures photo
"Bullet to the Head" features confrontrations between James Bobo (left, Sylvester Stallone) and Keegan (Jason Momoa). | Warner Bros. Pictures photo
"Bullet to the Head" features Sylvester Stallone (left) and Jason Momoa in a fight sequence. | Warner Bros. Pictures photo
The cast of "Bullet to the Head" includes Sylvester Stallone (left) and Sung Kang. | Warner Bros. Pictures photo
Like the amped-up comeback tour of two rockers who had their heyday sometime in the mid-1980s, Sylvester Stallone and director Walter Hill (“48 Hrs.,” “The Warriors”) join forces. They’ve made a hard-hitting exercise in beefy, brainless fun with the New Orleans-set actioner “Bullet to the …