Introduce Miles in the next trilogy (1st movie of this trilogy, 4th Holland movie overall)
Let him be a small, side supporting character in the 1st movie, have the symbiote come in to play for Parker
Second movie maybe builds with Venom, Miles is also in it and is more involved, maybe finds out Parker is Spider-Man. At the end maybe he gets bit by his own radioactive spider
Third movie is the finale for Holland Spidey, Miles takes over as Spider-man
Steam wishlist- https://store.steampowered.com/wishlist/profiles/76561198354198646/#sort=order