Senior Base
I don't think that ANC will be junior unless they put all the growth up here. Possible I suppose, do all Southeast flying, all the Chicago, Denver, Portland long hauls- plus the Arctic out of ANC. They would have to at least double, maybe triple the base from today to cover all that flying. If they did that, it would indeed become the junior base.
As of now, the ANC junior Captain is about 125 numbers senior to the SEA junior Captain.