User blog comment:Justice Avenger/Just to kill some time! XD/@comment-1038387-20121026204833

Duo:
 * Captain Marvel Jr. and Kid Eternity. Because they're brothers.

Trio:
 * Raven Red, the Scout, the Squire: Club of Heroes sidekicks.

Team:
 * Skyrocket, Stargirl, Mister America and Commander Steel: Patriotic and diverse.