The idea of 'new homes' for threatened species has been proposed before. Several zoological parks maintain small breeding colonies of a few threatened species. There are many problems, such as the necessity for genetic diversity in a colony for long term success. Every area has its own parasites, etc., which could attack the colonists.
Unfortunately, likely new habitats are also under threat, moreover imported species could threaten the native species.
There are no areas of Brasil, etc., which are outside of the reach of the logger, the miner and the farmer. Logging in Brasil has reached the point where the thin, tropical soil cover is threatened, and this could affect temperature and rainfall within 30 years.