Now before yall try and say “Well Niziu” I’m talking in terms of korean girl groups. 
Anywayyyy…
JYP as a company are in an interesting position when it comes to their girl groups. Although they have ITZY and Nmixx, neither group has overcome TWICE or even come close to their impact and success.
All the other big companies have rolled out their new girl groups for the 5th generation (SM, Hybe, YG, Starship, etc) yet JYP hasn’t. And it could be bcs Nmixx is entering their 3rd year as a group but by the time Itzy were in their 3rd year, Nmixx had debuted.
Now that TWICE are entering their 10th year as a group, I think it’s high time that JYP debut their next large girl group and let them take the reins over from Twice. Twice has cemented themselves as kpop legends and yet they’re still the gg bringing in the most income for JYP. The Twice members are growing older and surely want to enter into other things like acting, modeling, and solos (which they’re doing already). Which won’t leave much room for actual comebacks.
So now, imo, with Itzy starting to debut as soloist and Nmixx growing older is the perfect time for JYP to debut another group with the “girls next door” feel that TWICE brought to kpop.