Originally Posted by Matteh
Each league has different ball rights with people like Nike/Mitre/Adidas/Puma and so on. So the guys in the Premiership play with a different ball to the guys in Spain/Germany/Italy and so on. Need a World Cup ball precisely so they do have the same ball and a level playing field.
Not only that, but the Jabulani has been used at the FIFA World Club Cup, the African Cup of Nations, has been available to use in the Bundesliga (which doesn't have a matchball sponsor, so Adidas sponsored teams have had the option of using it in home games), the MLS, Argentinian Clausura and the latter stages of the Scottish Cup.
It's not like the ball has been brought in cold, it's been used reasonably extensively throughout the last 6 months.