Maybe. Integrations can be tricky, they can go smooth as silk or be a train wreck.
It's not like adding books to a shelf.
Lots of space with hiding places are key.
Here's some tips about....
Integration Basics:
It's all about territory and resources(space/food/water).
Existing birds will...
You'll want to keep them in there for at least a week before attempting full integration.
Hopefully the coop is nice and big and the run is easy to get in and out of both with places for the newbies to get away from the older birds.