This is pretty typical of an earnings call. Most companies are not going to mention anything about future plans as it could be used as a lawsuit if it doesn't happen. The fact they mentioned anything at all is a pretty big deal.
I'll have to look around to find the old official announcements, but if I remember correctly during the Hollywood "Evolution" plan updates and the Japan park buyout, Uni (Comcast) raised their scheduled R&D investment to something like $500M/quarter. Obviously much of this went to Diagon Alley, Volcano Bay and Potter West, and there is still expansion at Potter East and a mystery project on the lower level of Hollywood, but with the big stuff done there are still spending $2B/year on "new" investment and I've never seen this estimate lowered. They could easily hide funding for a large new park in those numbers.
P.S. Here's the latest I could find from the Q2 earnings report: "NBCUniversal’s capital expenditures of $461 million increased 36.3%, reflecting continued investment at Theme Parks.". So $500M isn't all going to parks since NBC is in that bundle of cash. The only thing I can't figure out is how much of that is going to the new Beijing park.