Since everyone's talking about Kali, I'll bite;
Kali River Rapids was designed to be Tiger River Run - the Asian counterpart to the iconic Kilimanjaro Safaris. So the rapids would presumably tame and the focus and draw of the ride would be that of Kilimanjaro Safaris. I presume that much like the poacher storyline of the Safari, the deforestation story of this ride would havw been secondary to wildlife.
The problem is that Tiger River Run was a poorly thought out ride. Rapids rides are not a good ride system for animal encountering; it's a terrible one. The rapids are problematic for the animals themselves, because they're loud and will cause stress for animal inhabitants, and the speed and general way of a rapid ride takes away from animal viewing; such a ride would need to be done with a boat similar to Jungle Cruise. So with that scrapped, you have Kali River Rapids.
Kali River Rapids is barebones as a concept without the animals. It is barebones because it:
1. Is too tame to rely all too much on thrills.
2. Does not have 'scenes' - only one. Scenes make the ride exciting, grandiose scenes are the fun climaxes of the ride. In Kali, there is only one scene so the rest is just wandering along a river; beautiful filler.
3. Is very thin on plot.
4. Without thrills, is far too short.
That said, if they put some money into it, it'd be a really good ride.