JamboEveryone.com is reporting that work is being done on the former Tapir exhibit inside Maharajah Jungle Trek. In subsequent postings to Twitter they confirmed it would be a species of primate going into that area. This was then confirmed by both @JamboEveryone and @jkwana that the new species would be Lion-tailed Macaques.
When the Majarajah Jungle Trek opened in the Asia section of Disney's Animal Kingom in 1999, one of the exhibits featured a Malayan Tapir. The tapir exhibit was between the Komodo Dragon and the Malayan Flying Foxes/Rodrigues Fruit Bat exhibit. The tapir passed away in 2010 and ultimately the exhibit became home to Bar-Headed Geese, Roechelle Ducks and White Naped Cranes. Those species have since been moved to a spot further along the trek as work progresses.
Photo above courtesy of San Diego Zoo.