Even if BLACKPINK doesn’t renew their contract, I’d still see them as a Big 4 group. I mean, technically groups like 2NE1, BIGBANG, iKON, or Epik High aren’t part of the Big 4 anymore, and BLACKPINK would be the same. But for me, 2NE1, BIGBANG and the others will always be ‘YG’ no matter what and that’s exactly how I see BLACKPINK too.
and I also think that once Blackpink leaves YG, YG won’t really be considered part of the Big 4 anymore.