Spider-Man: Beyond the Spider-Verse's ideal ending would set up an impossible feat for the Marvel Cinematic Universe's Spider-Man 4. Miles Morales' world grew larger with the character's animated sequel. Even though Spider-Man: Across the Spider-Verse cut designs for several character variants, there were more than enough different versions of Spider-Man and his villains appearing in the movie, as Miles left behind his universe to venture into the wider Spider-Verse. Returning characters from Spider-Man: Into the Spider-Verse included Shameik Moore's Miles, Jake Johnson's Peter B. Parker, and Hailee Steinfeld's Gwen Stacy.
https://screenrant.com/beyond-the-spiderverse-ideal-ending-impossible-spiderman-4-movie-setup/