That physical versions of Nintendo Switch 2 Edition games will include the original Nintendo Switch game and its upgrade pack all on the same game card (i.e. they are exclusively Nintendo Switch 2 game cards, with no download code). Alternatively, some publishers may release Nintendo Switch 2 Edition games as download codes in physical packaging, with no game card.
I’m reading:
Of course if any post release patches that occur may need to be downloaded but their apparent intent has been to provide a version that is playable from gamecard.
This sounds like the best implementation with the exception that the base game is not playable on S1 consoles (something you could do of you bought it digitally).