Thor 4 is looking to replace Thor with lady Thor basically doing what all stage 4 has been doing by marketing the traditional white male hero people want and just replacing them with a mary sue POC in their own movie, the new Spider man trilogy is probably not going to have a white male lead with a "diverse" variant of one of the established comic book spider men, and Marvel is fine just race swapping all lesser known White male superheroes they have not already used.
Yeah, they are drowning in the diversity pool.