What I’ve heard so far is that they are building new stables at Beas River Country Club for the horses, as well as at Sha Tin. The eventing will be at Beas River and the adjacent Fanling Golf Course. I have seen some of what they’ve started, and it looks to be very nice. The footing will all be high-quality all-weather footing, I believe done by Otto Sport, which has done the footing at many top venues in Europe, and was also in charge of the footing at the 2006 World Cup Final in Kuala Lumpur.
Creating a disease-free zone in Hong Kong is not a problem. Because of the racing industry, Hong Kong has stringent quarantine rules, which helps to keep things “clean.” For example, my horses can fly from Malaysia to Europe with no quarantine on either end of the journey. However, if my horses fly from Malaysia to Hong Kong, they must do two weeks of quarantine.
I have not yet seen any plans for Endurance (is it even included as an Olympic sport?), but Hong Kong has much larger parks and more rural area than most major cities.
As for the weather, the schedule is being designed with extra days built in for all disciplines should there be inclement weather preventing the competitions from taking place as scheduled. Actually, one should hope for a typhoon, because they are almost always preceded by three days of beautiful weather, and the weather afterwards is generally quite good as well. Unless you are riding in the middle of the day, the weather is really not all that bad, and I find the weather in Hong Kong to be much more suited to riding than the weather in Athens, which I thought was desperately hot.
One of the nice things about Hong Kong is the size of it. Nothing is more than 40 minutes apart, and the traffic is pretty predictable, and you are never at a standstill for too long. The Hong Kong Government and the Hong Kong Jockey Club are working to educate the public about equestrian sports in order to promote interest in the events being held, but since a major event like the Olympics has never been held in Hong Kong, and is not likely to be held there again anytime soon for various reasons, I think the turnout and public interest should be more than sufficient.