This question is inspired by Twice’s massive collection of merch, how involved they are in the process, and the variety they have besides the typical photo cards, books, tees, calendars etc.
For me I’d like to think that the girls would release the following:
Jisoo cute onesie, a multi board game where one of the games is you you have to stack bottles on your head
Jennie jewelry box or jewelry line
Lisa camera accessories (i.e camera bag, strap, charms), some sort of cat accessory line (i.e hats or little costumes that are renditions of what they’ve worn), special photobook
Rosé dlc collab with a singing game