Once here. NewJeans CAN be bigger than Twice, for sure.
I think the real question though when asking "Will X be bigger than Twice?" is "Can X out-sustain Twice?" For me, the most impressive feat that Twice is doing is that they're still growing 7+ years after their debut, in an industry where talents are disposable and disbandment is the norm. Twice survived overworking, injuries, depression, organized hate posts--any combination of these can take out any group despite a stellar debut (see 2NE1)
For the dream to come true, I believe the proper call to action for Bunnies is to continue supporting NewJeans, protect them in social media, and always wish them the best of health.
