I think the daughter stuff has always just been shoved in regardless ever since they cast a Black girl in an unknown role YEARS ago. I think a lot of the reports of these movies are throwing stuff at the wall honestly. At some point over the last few years they've said ghost rider, moon knight, black knight, Dr. Strange, Lilith, Dracula, Mephisto, etc. are in the movie.
The only thing I'd guess is there's going to be some set up for ghost rider, just because he's probably the most popular marvel character at this point who hasn't been in the MCU, with no released plans for his inclusion in the MCU, and with a Midnight Suns movie rumored that is going to need his inclusion.