https://www.gamespot.com/articles/pubg-snow-map-coming-to-xbox-this-year/1100-6459603/

At Microsoft's E3 2018 presentation, it showed off upcoming content for PUBG. After teasing the Sanhok map, it gave the first (extremely brief) glimpse at the game's fourth map. Better yet, it revealed that this new map will be available on Xbox One in winter 2018.

PUBG on PC has lagged slightly behind the PC version, as the second map has only come over to Xbox recently. This presentation could signal the two versions growing more parity, as the snow map hasn't even been shown on PC yet.