It is supposed to be an upgraded version of the current Fragile Forest biodome set in the new Rainforest Park, a "Fragile Forest Mark II" if you will. The design will be influenced by the Masoala Halle, and there have been projects going on to see if this is a feasible idea to bring to life, the re-introduction of Ruffed Lemurs into the current Fragile Forest being an example. Keepers have also been wearing civilian clothing and monitoring what guests do in the absence of, well, themselves. They're collecting data to see whether guests are able to remind one another to be mindful of the animals there, their behaviour whenever they get too close to the animals, how the guests interact with the environment, etc. All of it will be form a part of the determining factors as to whether they should go ahead with the project or develop others instead.
A mixture of both. This development of the Mandai area will be a major reshuffle of what each park has to offer. For example, as the two new Rainforest Parks will primarily focus on species coming from their namesake habitats, the other parks will be able to place more emphasis on other habitats like grasslands, temperate forests, highlands, coastal areas and etc. Exciting new developments include a mega-habitat for Asian Elephants, Indian Rhino and Malayan Tapir, a possible re-building of the parks' hoofstock collection, etc.
The organisation will be seeing a lot of animals going in and out of the country, and to answer your question regarding pangolins, yes, they will be retained. The Night Safari serves as sort of the main rehabilitation centre for the native Sunda Pangolin.
