Hi! As the GNW treasure was recently released, we don't really have any details regarding when or if Naruto Kurama/Madara fragments would be in events for coupons/ingots. Based on my own opinion, I believe that the likelihood of ninjas including Super Rare ninjas appearing in events is high. This opinion is based on the fact that Susano'o Sasuke is redeemable in Limited Shop (amongst many other events) and the fact that Itachi Uchiha [Susano'o] is available for coupons/ingots in "Christmas in a Capsule" event.

Sorry that I am unable to give you an approximate time or more detail, as there is not much detail regarding this at the moment. When I do find out more, I will be able to update you guys on it!

Merry Christmas and have a safe and happy holidays!

~Jib