I have no doubt we will eventually be heading to the Primary Moon given that is where Zodiark is imprisoned, and destroying that false god once and for all is clearly what the story is leading to (especially as Yoshi is eager to wind up the original 1.0/ARR 'Primal/Ascian/Hydaelyn/Zodiark' story so as to take the narrative in new directions).

So, have patience I guess? ^^