Justice League Power Cards by KF Holdings were distributed in boxes of Post Cereal in 2004. The seven-card collection is based on the Justice League animated television series that aired from 2001–2004 on Cartoon Network. One sealed card was included in specially marked boxes of Alpha-Bits, Cookie Crisp, Fruity Pebbles, Golden Crisp, Honey-Comb, and Oreo O's.

Each card back contains a character profile and a code that could be redeemed online for a "Postoken" on the defunct Postopia.com website. Each "Postoken" code was used to unlock one of three different Justice League adventures.

Post also released a limited edition Superman toy figure with two-box bundles of cereal. The packaging contains a cut-out card panel depicting all seven Justice League members. The panel uses the same promotional artwork printed in the 2003 Inkworks Justice League series.