Not to be a Debbie Downer but I can already see one major problem with this cup: the vast majority of American and European voters will not have been to the zoos in the other continents. I personally have been to nine of the US zoos @TheGerenuk predicted (though I personally don't know if I'd have them all on the list) and seven of the confirmed European zoos (personally I wouldn't have included Plzen despite the fantastic collection). I'd imagine I'm very much in the minority, though, and most people from either side of the pond will have just visited the zoos on their side. I'd also imagine those in Oceania and Asia who have visited other continents will mostly have been to Europe and not the US (this just seems to be how it is from the people I know). The same way US voters are inclined to vote for the collection they're most familiar with, I'd imagine we'll the same effect take place across the entire cup from voters unfamiliar with the other countries'/continents' zoos. I just see a US zoo vs European match being determined simply by how many more voters from that side of the pond are participating-- the answer of which will almost certainly be European.
~Thylo
~Thylo