There is a very large population base in east Asia, but right now the big money for tv rights is in the other hemisphere. It may be a bit different in 30 years time, who knows, but we are not a contender for 2030 and may not be for some time after that. Including New Zealand would be then only way of ever getting a World Cup to OFC, there may be some political push for that to happen at some stage, but it wont be until the finances are somewhat close to what they can get with world cups in other parts of the world. Having said that I don't think stadia and other infrastructure will be a problem. The risks are all on the financial side.