RIO DE JANEIRO — The Confederations Cup has the final nearly everyone wanted: A long-awaited matchup between world champion Spain and host Brazil. The most dominant team in recent years and the most successful team of all time will meet on Sunday at the Maracana Stadium to decide the winner of the eight-nation warm-up tournament for next year's World Cup. It will be the first time the traditional football nations meet in more than a decade, and the first competitive match between them since Brazil's 1-0 win thanks to Socrates' goal in the first round of the 1986 World Cup in Mexico.