They're Battlefront II skins, I wouldn't really deduct anything from that lol
^^agreed with Kineda, we know she's gonna have her hair down at some point as we've seen it a few times in the marketing... and Kylo there looks like he does in the image that Rian Johnson shared at Celebration
That outfit of Rey's looks very old school Jedi IMO like something out of the Old Republic
EDIT it actually does say "Last Jedi themed look" so those are absolutely from the movie
If you look very closely at the pic, it says they are actually movie production stills, not actual in-game images, so I think those are genuine photos of them in their new costumes.