The elephant exhibit is planned at the same area north of the Gorilla/Bonobo house and the malayan tapir house - unfortunately there is no expansion in the surrounding park possible anymore.
The new enclosures will cover the area formerly used for anoas, onager, bison and the existing deer / farm / petting zoo. In between these two parts there is currently also a major area unused which is since a few years a construction area due to the city building a big tunnel below Wilhelma and Rostensteinpark (as the tunnel construction has been delayed also the start of the elephant house construction had to be delayed a few years)
Wilhelma plans to built a major Asia area there starting with the existing big cat house with Sumatran tigers, Persian leopards and Asian lions, continuing with an extended Indian rhino house and the Malayan tapir house than followed by an enclosure for Sibirian tigers, the huge elephant house and an Asian village including yaks and deers.