Mei

A snow-covered, multi-level structure with a windmill is shown in a snowy environment, followed by a close-up of an aircraft's instrument panel with gauges and switches, then a soldier in a helmet with a mouthpiece in a dark setting, then a robotic character with glowing blue accents standing in a snowy area, then a glowing golden snowflake-like emblem floating in a snowy sky, and finally the emblem with the text "OVERWATCH Winter Wonderland 2017 Dec 12 - Jan 1" displayed over a snowy landscape.