I think the answer comes straight when you look at Universal Hollywood, and they could've waited until after the film's critical and financial results to announce it (because at the end of the day, the ride would've gotten something radically changed there, due to the shape). Yet, they took the leap and announced their massive overhaul practically day's before their 25th Anniversary celebration of JP.
Beijing also seems very committed to Jurassic World, or else we wouldn't be seeing that appear in the leaked photos.
It makes sense to use World, if done effectively. And if it is happening, which it is seeming to be, they know what they are dealing with and that they feel confident in that they can bring it without much issues.
That said, I am betting that if they are doing anything first, it's the River Adventure overlay (R&D on both Hollywood and Orlando to lower costs).