Exposing Bones to Parent Artboard

An issue I ran into is that I have three options buttons. The buttons are based on the same image and are designed as flags. Each of these buttons has a different animation for the bones in all states, but I would love to have them share all the same rig, so I set that up in an own artboard.
Currently, this is not possible, I need to copy the flag and its bones into the main artboard to do the specific animation states there. I like to think of artboards as derivative steps and being able to give multiple instances of one artboard different animations sounds quite intuitive within this assumption.