Demon's Souls and Dark Souls 1 were more 'late areas ended up unfinished' and less 'the entire game's plot changed 4 months before release and half the bosses and areas now make no narrative sense if you think about it for longer than 0.5 seconds'. Like DeS would've fundamentally been the same game had it had the 6th Archstone, and DaS' Project Dark trailer looks like the same game unlike BB with Project Beast. Even elements like Andre pushing that Firelink statue away or being Gwyn's descendant pale in comparison with whatever the fuck DS3's plot was meant to be during the The Know leaks