There have been plans out on the Internet on the River Country DVC for years - just waiting for Disney to pull the trigger.
The plans show that the Mickey's Backyard BBQ pavilion was planned to be rebuilt over behind the Settlement Trading Post.
The Tri Circle D Horse Barn was to be rebuilt up at the front of the Fort near where the horse trail ride corrals are.
So they would need to start these rebuilds and have them in place (for sure for the horses) before the tear downs of the old buildings would start. But other parts of the River Country property could get started with clearing land, etc. in the mean time.
Bama Ed