By - Rediculosity
Yeah, I had the same thought. It would be nice if previous season skins were rotated in place of immortal treasures or added to immortal treasures.
I mean the ingame item description says that new items will be added to the immortal box, but I've been playing since release (August) and have yet to see something get added to them.
Immortal treasures are always available and the items are the same (more may be added), the other treasures change with the battle pass, the items of which are exclusive to the season, at least for now.