The big group trend seems to be over, the industry is going back to 4-5-6 member girl groups. Of course survival show groups will remain big, that's by the design. The only variable remains that big group YG promised since before BP.
Additionally I think we already have the full 4th gen line up, maybe 1-2 groups will join the competition, but other than that, the next 5 years will be IVE x NJ x LSFM x NMIXX x Aespa x Gidle x Itzy era