I believe the ideal way to handle this would be to keep all story related content marked as spoiler territory in case anyone wanted to still get into the game completely blind once it comes out, but once the game does come out i would say keep the info within the spoiler tab and later remove it after lets say two months (once march rolls around remove it I say) so that even late new comers or people who wanted to wait for a price drop have a chance for the completely blind playthrough.