15 Star Weapon Release Date

Has anybody heard any information about when we will get 15 star weapons on the NA servers? I was hoping that the latest update would have them but it doesn't seem to. I was searching all over the place online and I couldn't find any information at all about this. I'm assuming that it will probably be in Chapter 6 though.

We do have a few already on the server, specifically the Ophistia and Novel weapons, which are currently drop only. As for the ones from Zig's trade, we will probably see those put in once we get the final Episode 5 content update.