I started around the time Final Fantasy was running on Arena, but I didn't go through the tutorial quests fast enough to get access to the store until after the Final Fantasy cosmetics had left. From my understanding, Arena is a little limited on repeating cosmetics, and it may not repeat cosmetics from a UB release after the UB event ends.

I would love if Arena could try cycling a "Retro Store" where they re-run older cosmetics or older deck bundles. You could make it fairly infrequent, delayed, brief, or unpredictable so you aren't cutting as much into initial buy-window pressure. I would still definitely spend money on these assets you already have a year later. It also might give folks some flexibility to buy these products if they spend heavily enough on physical during the standard release months to still spend into the older cosmetics during a window where they are otherwise less likely to spend on any MTG products.

This seems particularly pertinent for UB, considering new players might buy in more aggressively if they see older UB products they would have liked to go in on but they weren't around for.