Saturday's announcement that FC Barcelona has agreed to sign Brazil star Neymar da Silva Santos Jr. has soccer fans salivating at the possibilities. By shelling out €28 million, Barcelona has added the coveted 21-year-old to a roster that includes Lionel Messi and eight members of the Spanish national team.

But the evidence suggests Neymar not be the world-beating superstar that fans expect. If the team's recent history of big-money overseas signings (shown below) is any judge, he's more likely to be a colossal waste of money.