https://www.gamespot.com/articles/overwatch-update-will-let-you-change-skins-before-/1100-6456650/

It looks like tomorrow's big Overwatch Year of the Dog update will also include a welcome new feature. Starting tomorrow, February 8, you will have the option to change your character's skin at the start of a match. This is a feature that fans have been asking for, so it's nice to see it finally come to the game.

You can see an animated GIF of this below, which Blizzard shared on Twitter today when it announced the new feature. The footage below is from the PC edition, but Blizzard confirmed on Twitter that the feature will also be available on PS4 and Xbox One.