Spider-Man: Miles Morales - 20 Secrets, Easter Eggs & References Explained
14. Black Cat And Tombstone
During the mission "Tinker Tailor Spider Spy", pay close attention the Roxxon monitors, one of which you will see a list of three "associates" two of which look very familiar.
The top one refers to a "Cat Burglar, Recently Retired, Whereabouts unknown". If the silhouette didn't give it away, this is a definite references to the Black Cat, who appeared in the City That Never Sleeps DLC for the first game.
The one beneath her is described as "Nearly invulnerable, Currently incarcerated." The silhouette may not be as distinct, but with that description, this certainly refers to Tombstone, another villain who appeared in the original game and also as a side character in Into The Spider-verse.