I heard people were disappointed with this teaser... I don't understand it. This teaser is perfect. It will no doubt get ruined with 2 more trailers spoiling everything but this imo is perfect. We know nothing except it takes place at Christmas.
The entire scene is cosy and warm and nostalgic, yet creepy It perfectly gets me in the mood, the Christmas atmosphere is re created great, set building is awesome, the lighting is atmospheric and Art's reveal is unsurprising yet chilling.
I already feel terrible for the little girl's faith, she looked so happy.
I guess it won't really be part of the movie itself but as a teaser it works tremendously.