On the Nic Cage playing both the good guy and the bad guy, Face-off comes to mind. He is the bad guy (Caster Troy) at the beginning of the movie but his "face" is put on the good guy's (Archer) body, making him the good guy until the end, when the Archer gets John Travolta's face back.
Do you think they burn Nic Cage's face at the end or could they make a sequel with the face on another bad guy. Maybe call it "Face-Off 2, Face Your Enemy"