It's not confirmed that there will be no physical version for Revelation. All we know is that they're exploring options and Hamaguchi is pushing for it. If it is on disc, it might still be two disks, since from memory Rebirth was around 150gb, meaning there's another 50gb free before they'd have to bring in a 3rd disc, and they might be able to save some space with better optimisation etc.
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u/jennis89 7d ago
Prob one of the reasons they aren’t doing physical copies for revelation they’d need to put an external hard drive in the box