An image of the layout with the paths and zones has been given to the press, but it is not the official map (with all the animal cut-out, toilets, etc.). Mandai will probably release the official map together with the opening date. Currently, Mandai has only announced that it will open in March.
SPECULATION: I personally believe that it is probable that Rainforest Wild will open to the public on 15 March. This is because it is the first day of the March school holidays for Primary Schools in Singapore.