I love the game so far!! However, I am less into JPop and more into KPop. You might reach a wider audience with a KPop focused expansion or maybe a mod for the game since Kpop is huge right now. Here are some the ideas I had. Any of these could also be worked into the current game as well. Just thought I would share my thoughts, even if you do not use any of the ideas.

Expand your label into the world of South Korean Pop. Check a box at the main menu or in settings to start a KPOP label or JPOP label. 

1. All Idols begin as trainees age 11-14.
2. Training Rooms for Vocal and Dance serve as places for trainees to build their skills.
3. Idol Screen split into 3 tabs.                 
   Trainees / Units / Solo
4. Same Idol Stats and System with added ability to assign a ‘position’ to each Trainee/Idol to easier mark their roles. Leader, rapper, etc.
5. Same Media, and Singles but also add the ability to do a Mini-Album or Album.
6. Change ‘Election’ Special Event to Produce12 type televised competition, where your trainees that have not made their debut can try out for a competition show to be in the national girl group.  This gets a boost to your entire agencies activities for an entire year.
7. Same Research and Policies
8. More emphasis on trainee vs debuted idol
9. More emphasis on group identity with an icon, color, etc. as well as a name that you can assign for the group
10. Ability to post to social media.
11. Top Korean music Charts for charting with similar names groups to top KPOP acts.
12. Promotion Schedules for Debuted Idols that focuses on a single with a combination of Busking, Radio Interviews, Tv Appearances, Festival Performances, and Tv Performances on the Countdown.
13. More Business Proposals with More  Family Friendly Artwork
14. Korean Pre-generated Names
15. Ability to change idols hair style, hair color, clothing color, and outfits in their photos.

I think there are plans for a system that will allow for custom stories and things like that. 

Custom storys would not be the same buttdress. 

Have to say I love this idea. I'm also way more into Kpop. This game could actually blow off if something like this exists.

To be honest if I could code and if it would be possible to create mods for this game I would love to contribute a mod to this. Maybe we can find some people who are interested (maybe also people who can code) and we could work on something like this together. I studied a few semesters of game development (no coding tho), so I do have a little bit of background knowledge in game design and balancing. Would be up for it if someone's interested.

Aw wow thanks everyone! I would be willing to do some kind of help with a mod as well if the game will have that capability!