I assume the relevant IPs are as followed:
Most likely:
The Lion King (maybe the rumored Paris ride, located in the expansion plot to the left of Harambe Village)
The Jungle Book (the previously rumored boat ride located past Maharajah Jungle Trek)
Avatar (third ride in the Pandora expansion pad, either the Banshee walkthrough or new ride rumored for Disneyland)
Less likely:
Moana (would make sense within an Oceanic land, but it's probably going to MK at this point due to its absurd popularity)
Raya and the Last Dragon (technically about an environmental disaster I guess, they'd have to do some work gracefully transitioning from a South Asian to a South East Asian aesthetic).
Planet of the Apes (sometimes about the folly of man's attempts to manipulate nature, sometimes about nuclear annihilation, sometimes about how the human impulse towards violence, and there's never really a happy equilibrium between humanity and nature)
Ice Age (only really animals because they walk on four legs, the direction of those movies is really incoherent)
Rio (Actually has themes of environmental responsibility, but idk if anyone cares about it)
Alien (lol)