I never said nobody would care about new girl group. I said they would have rather normal start because they don't have ex-survival show members or already established idols as members, they don't even have 1st HYBE NGG hype and don't have BigHit/Bang PD association. All they have going for is Min Heejin brand, which can only give them casual interest from people who know Min Heejin's works, but not a hardcore fandom that will 100% buy and stream their debut song/album. There will be certain curiosity from HYBE groups' stans, which can go as far as checking out the group. They are essentially boy group stans and majority won't necessarily stan gg just because of HYBE. Their pre-debut fandom as of now is small af, which makes sense as nothing is known about the group. Depending on the members and their talents, concept and music they can grow.
Fromis_9 comparison doesn't make sense. They are a group formed from not so popular survival show. Even though, they had Pledis association, they joined HYBE/Pledis officially recently. Fromis_9 is in their 5th year and is more or less established now, though they have room to grow, it makes zero sense to compare them to the group that is debuting now. ADOR NGG number of members, concept, music will be different from them, which is also deciding factor for groups popularity. To sum it up, when you are comparing something, context matters. We can only wait and see. :)