Overwatch 2 is going to have some new playable characters without a doubt, but Blizzard hasn't mentioned any specifically. While we're still waiting for an official confirmation, a special video Blizzard put together for the holidays might have teased one of those characters.
Blizzard ran a special yule log video for the holidays, which featured Overwatch director Jeff Kaplan sitting by a fire and randomly talking. During the extremely long video, Kaplan mentions the Junker Queen at one point, and wonders out loud if she'd ever make it to the playable roster. Blizzard obviously knows that talking like this will drum up speculation and interest, so either they're teasing a character that's sure to join the game, or they're just riling up fans for the fun of it.