Announced by the USPS on July 28th:

Winter Scenes celebrates the beauty and serenity of seasonal sights amid snowy landscapes. The 10 different photographs featured in this booklet of 20 stamps showcase the special allure of winter, with iconic scenes from the northern United States. Art director Derry Noyes designed the stamps with existing images taken by various photographers.New information will appear below the line, with the latest at the top.

Updated December 5th:
The Scott catalogue numbers for this issue are:
5532 Deer
5533 Northern cardinal
5534 trees and gold sky
5335 red barn with wreath
5536 barred owl
5537 blue jay
5538 red barn with snowy roof
5539 cottontail rabbit
5540 snowy path in woods
5541 two horses

Updated September 16th:
Here are the first-day postmarks for this issue:The Digital Color Postmark measures 2.97″ x 1.42″The pictorial postmark measures 1.94″ x 1.19″

Updated September 10th from the Postal Bulletin:

On October 16, 2020, in Winter Park, FL, the United States Postal Service® will issue the Winter Scenes stamps (Forever® priced at the First-Class Mail® rate) in 10 designs, in a pressure-sensitive adhesive (PSA) double-sided booklet of 20 stamps (Item 683000). The stamps will go on sale nationwide October 16, 2020, and must not be sold or canceled before the first-day-of-issue.

Winter Scenes celebrates the beauty and serenity of seasonal sights amid snowy landscapes. The ten different photographs featured in this booklet of 20 stamps showcase the special allure of winter with iconic scenes from the northern part of the United States. Art director Derry Noyes designed the stamps with existing images taken by various photographers.