Related Clues:

• They aren't behind you
• Ones to beat
• The bad guys
• Unfriendly types
• Hatfields and McCoys, e.g
• Two-Face and the Riddler, to Batman
• Opposing sides
• Certainly not friends
• Celtic and Rangers are old ones
• The Jedi and the Sith, e.g
• Anti bodies?
• Ones on either side of a "v."
• Rival bands
• Hatfields, to McCoys
• G.I. Joe and Cobra Commander, e.g