"Spider-Man: Across the Spider-Verse" is a movie filled with Easter eggs and cameos that fans of the Marvel universe will love. Here are some of the best ones:

- The movie features a gallery of Spider-Verse villains that includes Donald Glover's MCU Prowler.

- The movie features a voice cameo by Andy Samberg as Scarlet Spider, while his Lonely Island collaborator Jorma Taccone voices the Renaissance-era Vulture.

- The movie features a reference to "Doctor Strange and the little nerd on Earth-19999," which is a reference to the events of "Spider-Man: No Way Home".

- The movie features 56 different Spider-Man variants, each with their unique design and backstory.

- The movie features a cameo by the character Spider-Therapist, who is voiced by Michael Rianda.

- The movie features a cameo by the character Spider-Man India, who is voiced by Karan Soni.

- The movie features a cameo by the character Margo Kess / Spider-Byte, who is voiced by Amandla Stenberg.

- The movie features a cameo by the character Jonathan Ohnn / The Spot, who is voiced by Jason Schwartzman.

- The movie features a cameo by the character Hobart 'Hobie' Brown / Spider-Punk, who is voiced by Daniel Kaluuya.

- The movie features a cameo by the character Adrian Toomes / The Vulture, who is voiced by Jorma Taccone.

In conclusion, "Spider-Man: Across the Spider-Verse" is a movie filled with Easter eggs and cameos that fans of the Marvel universe will love. From MCU references to unexpected cameos, this movie has it all. Some of the best Easter eggs and cameos include Donald Glover's MCU Prowler, Andy Samberg as Scarlet Spider, and the reference to "Doctor Strange and the little nerd on Earth-19999." The movie also features 56 different Spider-Man variants, each with their unique design and backstory.