This is datamined stuff, not stuff that's 100% confirmed to be released. It's basically just conceptual stuff that hasn't been finalized and may not even make it into the live game.
Don't expect anything you see/read around the forums/reddit/Youtube to be in the game at any point unless it's from an official source, like a dev or someone.
albinokitten wrote: »There was a very pretty dress showcased before they added the shop in game, I was sad to see it missing!
Can't remember what it was called, but I hope ZOS puts that in. (With the option to dye it as well.)
This, this, this, and this. ^^^^^because we can not change the color of costumes make different colors of the same thing!
Also give us costume blanks so that we can create our own costumes from the things we find and make and dye them the way we want before we "create" the costume.