I was down for IW and admitted I was wrong, I always believed in Black Panther, hell I was one of the first to join Panther over IW. You can even find an AMATW over Solo club here by my hand.
As for CM, yes I know of her importance but the only three of the Marvel solo origins (I don’t count Spider-Man due to a reboot) have done over $300M (IM, BP, Guardians), and while I agree $300M is happening, I just don’t know about $400M mainly cause Wonder Woman beat it to the punch of being the first female superhero movie and I don’t know if it’ll have the same effect.