A huge rule is no awkward family reunions.

Adidas has unveiled 22 home kits for teams that have already qualified or are aspiring to qualify for the grandest soccer event on the planet.

For example, the Italians will play in their classic blue, Spain will take the field in their traditional red, and the blue-and-white stripes on the Argentina jersey are, as always, present.

"To define if I'm one of the best of the history, to win one competition, [of] six games, seven games. You think it's fair?" Ronaldo, who won four of his five Champions League titles with Real Madrid...