Maybe there will be a halloween themed event where you collect pumpkins, bones, scythes etc. through different activities which you then can turn in for rewards.

An event where you can turn in your "useless" items (Revival potions, anbu scrolls, low-level-refine runes etc.) to other valueables like coins or better items. Maybe 4 low-level-refine to get one medium-level-refine. I think this would be great for players to get more leverage out of their items that otherwise would be useless.