Mortal Kombat X looks like it's getting four more characters (update)

The Mortal Kombat X roster looks like it's about to get a little bigger, based on a handful of tweets from series co-creator Ed Boon. On Twitter this week, Boon teased "BIG (new) MKX news koming this week," and today he tweeted what appears to be a quartet of new combatants coming to Mortal Kombat X.

It's hard to make out just who those characters are; they're presented in silhouette and fog, and based on Boon's frequent teases and misdirection, it's not even clear whether these are the silhouettes of the characters actually coming to Mortal Kombat X.

That said, here's today's teaser image, which Boon paired with the word "Tomorrow?"

Mortal Kombat X already includes a handful of characters from the franchise who appear in non-playable form: Frost, Fujin, Baraka, Bo Rai Cho, Rain and others. It's possible that those characters might be mined for downloadable content.

NetherRealm and publisher Warner Bros. Interactive already released four add-on characters for Mortal Kombat X as part of the game's Kombat Pack. Tremor, Tanya, Jason Vorhees and the Predator are paid DLC, and bring the game's roster to 29 playable characters.

Mortal Kombat X was released for PlayStation 4, Windows PC and Xbox One in April. Warner Bros. officially canceled the PlayStation 3 and Xbox 360 versions in August. For more on the game, read Polygon's review.

Update: Warner Bros. confirmed today that Mortal Kombat X will get "new playable characters, skins and a new environment" in the first half of 2016.