It's safe to say they the theatrical success of Black Panther took EVERYONE by surprised.
Spider-verse, on the other hand, has not exactly been a box office bonanza. In fact, it has under-performed relative to all the accolades.
I personally have no interest in this CM movie because it is nothing but a cheap narrative ret-con in the MCU for the sole purpose of shoehorning this character in at the 11th hour. I don't like that. That essentially makes this movie completely disposable. But not in the same way the pointless Ant-man and Wasp movie was disposable. CM is disposable in a borderline intelligence- insulting way that repels me from it even more so than the terribly overrated, and absolutely charmless Brie Larson who they have clearly miscast in the role (I agree with @jsilverjanet up above, his comments on her performance in Room are spot on, you should definitely give it a watch if you are ever in the mood to watch a solid hour of unprovoked hysterical yelling, crying and over acting, which takes up more than half the film).
While I expect Disney to certainly make a technically proficient film, and there will obviously be a built in audience of people who go to see it simply because they have seen every other Marvel movie, I personally wouldn't be surprised if it hit Doctor Strange numbers. CM is no Wonder Woman.
-J.