Everything went quiet pretty much as soon as this was reported. There was definitely something being worked on because the Resorts World team took reporters on a press tour and announced it which, for them, is usually a good indication that they are actually working on something unlike some other companies.
There is only one thing that has opened since in that area that fits the bill for what this might have been and it opened quite recently at the end of 2019.
It's called Novotown and includes some of the elements which were described originally in the Resorts World releases such as theme park rides, cinemas, VR experiences etc. You can find out more here https://chinaattractionsexpo.org/2020/01/15/industry-news/lai-sun-group-announces-opening-of-novotown-on-hengqin-island-china/
I may be wrong but this looks to me like the project was scoped but Resorts World pulled out and the IP brought in was Motiongate and another operator took it on.
Does anyone else know anything about this project and what might have happened?