Given how snow and ice are Mei's theme many players expected her to get one of the best skins in the Holiday Update, and while she did get a cool (heh) new snowman animation for her Iceblock, the skin itself was rather mediocre. Following a surprisingly large community outrage Blizzard promised that Mei would be getting an awesome new skin at some point in January, which given her Chinese nationality was quite clearly pointing towards some sort of Chinese New Year event.
As such, the following shouldn't come as much of a surprise - Blizzard has just announced that Overwatch will be getting the Year of the Rooster update on January 24th, along with an a-Mei-zing new skin! While there is no actual information on the event itself, and whether it will come with specially decorated maps and brawl game modes, I can tell you that D.Va is also getting an adorable new skin! Have a look:
And for those of you that haven't been paying attention to Overwatch news over the past few weeks, may I suggest also checking out the most recent Developer Update. Long story short, it is Overwatch's Game Director Jeff Kaplan discussing the purpose of the PTR, as well as the team's plans for Ana, Roadhog, D.Va and Sombra. So if you're as interested in Overwatch as I am, I fully recommend you give it a look. Enjoy!