Well your first comment did not specify whether or not that treasure is limited, which many who don't play china might think it is permanent. At this moment, it is not but it would not be surprising that if a new treasure comes out and it has all of the edo jins and you can kind of guess what might be the super rare(s). It's all speculation since there are a lot more canon characters to be added to the game.

As for OP, worry about the GNW treasure as you won't benefit from getting a treasure early (unless you have $$$$) if you haven't got a super rare from gnw.