PS5 standard edition upgrade to ultimate possible?

Picked up a pre-order for the standard physical edition at my local store. Had some vouchers so it worked out cheaper than the PS Store, but it's just a code in a box. I'm cool with that for now, but I'm wondering if I'll be able to upgrade to the Ultimate Edition later if I decide I want those extra cosmetics.

I know the Ultimate Edition comes with some exclusive outfits, weapon skins, and probably a bunch of GTA Online cash, but I wasn't ready to drop $99.99 upfront. Has Rockstar or Sony said anything about an upgrade path? Like, can you pay the difference and get the Ultimate content after launch, or are you stuck with whatever edition you pre-ordered?

I remember some games let you buy a "deluxe upgrade" as DLC later, but I'm not sure if that's a thing with Rockstar titles. GTA V had different editions but I don't recall an upgrade option on PS4. Maybe they'll do it differently this time since the physical version is basically just a code anyway.

Anyone heard anything concrete, or are we all just guessing until November?

Source: r/GTA6 · Curated content.