Possible Clues:

• The Joker's archenemy
• Comic strip character, cricketer, second out
• Hero outlaw guards cash machine
• Superhero in club on island
• Comic book crimefighter, officer's personal assistant
• Poison Ivy's enemy
• Officer's assistant
• Role for George Clooney, Michael Keaton and Christian Bale
• Military aide to call back shortly after flyer
• City of southeast Turkey; the name of a superhero