Every four years, two of the world’s biggest international soccer tournaments collide, as the European Championships and the Summer Olympics are held in the same summer.
However, if the Euros were moved to the year after a World Cup, for example in 2011, 2015, etc…, there would be a major international tournament every summer with no conflicts.
In 2014, the world would have the World Cup. In 2015, each confederation would hold its championship. In 2016, the Olympic tournament would be held. In 2017, the Confederations Cup would be held.
Making this small change would also eliminate the potential of having some of the world’s best U-23 players miss the Olympics because both tournaments would no longer be held in the same summer.