on 13 June 2020
It is not a possibility it is certain PS5 and XSX are BC. And from the trailer it just seems like a BC version without any improvements. Still it may push additional 10M sales and quite possibly they may sell a improved version instead of giving free patch.
The question I have is that, if companies are going to keep pumping up remasters and next gen ports to the new consoles, are they going to allow BC to their titles? Is that something they can do (is the BC digital or mechanical?) or will the platform holders stop them?
The content owner could possibly forbid the listing of that game on digital store or not allow the free patches like on Smart Delivery. But if the console itself is BC without needing any patch (which seems the case for the PS5) then the publisher can`t really prevent that, at most they can limit you to play it without any manual patches, locking that to the PS5 version purchased.