Sony has confirmed that current PS4 Marvel's Spider-Man players will not receive the PS5 remastered version as a free next-gen upgrade.
The Marvel's Spider-Man: Miles Morales Ultimate Edition includes a PlayStation 5 remastered version of Marvel's Spider-Man, but Sony has now clarified to Kotaku that this remaster will not be available to purchase separately and can only be accessed by buying the Miles Morales Ultimate Edition, or by purchasing the base version of Miles Morales and paying more to unlock the remaster. It's all become a bit confusing, so here's the full statement from Sony given to Kotaku:
Marvel’s Spider-Man: Remastered is an enhanced version of Marvel’s Spider-Man, and is included as part of Marvel’s Spider-Man: Miles Morales Ultimate Edition for the PlayStation 5. In addition, players who purchase Marvel’s Spider-Man: Miles Morales on PlayStation 4 can upgrade at no additional cost to the PS5 version of Marvel’s Spider-Man: Miles Morales and can take advantage of a paid-upgrade to download Marvel’s Spider-Man: Remastered.Basically, if you want the PS5 remastered version of Marvel's Spider-Man, you're going to have to purchase the Miles Morales Ultimate Edition, or the base edition and buy the remaster for $20 from there. There will be no standalone version of Marvel's Spider-Man Remastered.
There are no plans currently to offer Marvel’s-Spider-Man: Remastered as a standalone. Players with a copy of Marvel’s Spider-Man for PS4 can purchase Marvel’s Spider-Man: Miles Morales Ultimate Edition to experience Marvel’s Spider-Man: Remastered on PS5. Marvel’s Spider-Man for PS4 also will be backwards compatible on PS5.
Marvel's Spider-Man is backwards compatible with the PS5, so you can still play the game on your next-gen console, but without the remaster's added benefits — which includes a new Marvel's Spider-Man Remastered trophy list. If you're only interested in Miles Morales, purchasing a PS4 version entitles you to the PS5 version.
Spider-Man: Miles Morales launches alongside PlayStation 5 on either November 12th or November 19th, depending on your region