First region is top secret. So technically data in the existing region could be moved to the new region, but not vice versa.
As long as they have multiple zones you can get the reliability ~ huge natural disaster that may affect other regions anyway.
A region is a cluster of typically three distinct data centers and this could have the three D.C.'s distributed geographically in a model specifically designed to provide both.
It doesn't say anywhere that this is a geographically distinct region.
It would have to have at least physically separate data centers, that's kind of the whole point of having this in the first place.