Creed III hinted at Amara Creed's future storyline in the series, and she already has a great real-life inspiration for Creed IV. Amara Creed is the daughter of the series' main character Adonis Creed, and while she hasn't had a huge role in prior films, Amara did get a slightly larger role in Creed III. It seems like she'll be getting even more of a spotlight in Creed IV, and the character's arc could mirror that of a true story.
https://screenrant.com/creed-4-amara-deaf-boxer-champion-true-story/