Any plans for candidates for release program over time?
Hopefully! Apparently the most successful way to release them is through releasing pups into foster dens:
This strategy has been successful so far, with survival rates as high or higher than for the wild pups that are naturally born, deVos said. Of the 90 pups born and released in 2019, at least 52 survived their first year — a 58% survival rate, higher than the average pup survival rate of 50%.
A wild mother has never rejected a captive-bred pup since the program in 2014.
The pups are usually more successful than adults released into the wild, because most adult captive-bred wolves become somewhat habituated to humans no matter the steps taken by the facilities to avoid that.
Mexican gray wolf pups released into the wild aid recovery effort