Source: https://www.relyonhorror.com/latest-news/remake-2-achievement-image-suggests-major-dlc/
Uh, so this is a huge surprise. Earlier today we reported on
a new achievement being added to REmake 2, which has been revealed to be a special tie-in with
REmake 3 after it was updated into the Steam version of the game. Out of curiosity, I went and looked through the Xbox One achievements to see if it had been added there as well.
Not only had it been — but it carries a
massive clue as to what this achievement could actually relate to. You see, unlike Steam or PS4 (where the achievement is represented as a small square icon), Xbox One Achievements actually use full-sized, 1920×1080 wallpaper images, which you can actually set as your dashboard background. It's pretty cool and makes earning achievements on Xbox One a little extra special. Thanks to this, we might actually have a
HUGE revelation about what this achievement could be relating to.
More at the link. Seems what we though was just a letter might end up being a prolouge or demo of sort for RE3 perhaps.