Femme Fatale Pack

Femme Fatale Pack is a rotating pack that contains Batgirl/Prime, Wonder Woman/600, and Harley Quinn/Animated for 400,000 Power Credits.

It's the only fixed pack known to have its contents changed. Batgirl Prime was added later and replaced Catwoman/Batman Returns. Challenge Booster Pack and Most Wanted Pack also had their possible contents changed, but they are random character packs.