I'm not sure if this thread is still being checked but in the future could the devs consider adding the ability to buyout other companies/labels? Like if you keep outselling/sabotaging a rival group, the stock prices of their company should decrease overtime and if the player has enough money (or if they've bought small amounts of stocks overtime) they could buyout their stocks and merge the company gaining all of their idols, staff and remaining fans or just have the company as a sub-label that generates income if the player maintains it. There could be a menu where the player could decide which idols or staff member to transfer between the sub-label and main label. Also there could be random events like natural events or economic crashes that could also affect other companies' stock prices.
Another idea i have is the ability to open your own training academy. I find it annoying to have my popular and well trained idols graduate and then i have to replace them with idols that aren't as skilled. So there could be an option to open an "idol school" that basically would "farm" future idols. For example the player could hire specific vocal and dance coaches (or graduated idols) to train young idols for 2-3 years. The player could make money by setting the training price for young girls to enter and after they graduate from the academy the player could have the option to let them join their group or accept a large sum of money from them. It would be cool to see the rejected girls appear in rival groups or have events of them harrassing the player's pre-exsisting idols out of jealousy. The player could even accept contracts from larger rival companies to train their idols at their academy for a hefty price (if the player graduates a specific amount of idols or something).
Thank you for working on the game devs, it's a really fun game and i look forward to seeing how the final product turns out! <3