Black Panther is a cultural event that Justice League was never going to be for a number of reasons, so there was a bigger audience to push those numbers up. Community leaders were not buying out theaters to see Aquaman and Friends. I had him compare the figures from Ragnarok, whereby the holy trinity for DC got mollywhopped by a B-Team character from Marvel

That said

Numbers don't lie. To pass that gross in so little time with a POC instead of their white trinity of super heroes has got to be utterly embarrassing and absolutely DC/WB's fault.Black Panther was a better movie on a basic story telling and movie making level, before you add anything cultural to either movie, so JL has to take the L