Disaster Recovery mode

Hi,
I want to present a scenario and understand how Elsa handles this scenario.

I have an instance in Region A (currently pointed by DNS) and one in Region B. Both instances are in Active-Active mode.
I'm using Mongo as persistence for Elsa, and the data is continuously replicated from Region A to Region B.

Is it possible to tell Elsa on instance in Region B not to pull workflows, to be. in standby mode, and to activateall traffic to Region B in case of DR?

Thank you