How many weeks do we need to keep doing the Nier weekly quest?

[Ultimatecalibur]

But all these weeks and... nothing happens. Why even bother putting it on the game?

I suspect, as well as with the Warring Triad/Role quest epilogue, that they are planning to lock a piece of Endwalker content behind Dark Apocalypse just as Bozja was locked behind the Ivalice raids.