Even though you probably won't notice this just by playing the game, but Overwatch has a surprisingly deep and interesting lore surrounding it. There are a couple of tidbits of information hidden throughout in-game dialogues, but most of the story is through either fancy cinematics such as the Genji vs Hanzo one, or through a variety of comics that focus on certain groups of characters. If you would like to give a couple of them a shot I would recommend checking out Old Soldiers featuring Reaper, Soldier 76 and Ana, as well as Reflections which showcases the tragic side of some of our 'heroes'.
The reason I'm mentioning all of this is because Overwatch will soon be getting another wave of story content, most likely spanning the entire year! The details are currently a bit scarce as all of this comes from a brief post by the Lead Writer Michael Chu, but its still exciting news nonetheless. Here's the full quote:
"We're all excited to continue to explore the world of Overwatch and are hard at work creating new story content for the year, which should hopefully start to roll out in the very near future. Stay tuned!"
While I don't know when we'll be getting this story content, I do have two theories on what this content might be. The first and most obvious one is some sort of ARG (Alternate Reality Game) surrounding Doomfist. A couple of people on the PTR have datamined a model for the Numbani payload with its glass cracked and the glove (the titular Doomfist) missing, so chances are Doomfist is nearing the final stages of development. And with a new character 'soon' coming to Overwatch it only makes sense to create a whole bunch of lore in order to introduce him to the world.
The second theory is a bit more 'out there'. Blizzard has previously stated that they have no interest in a Valentine's Day or Easter celebration, and that they are preparing their own event instead. And what better way to progress the story than through an update that introduces a new mini-game, a whole bunch of themed skins, and most likely some sort of big piece of gameplay content! Furthermore, this could also be related to the long-rumored Australian wasteland map, as that would provide the artists with a strong enough theme for plenty of new skins (i.e. something like Scavenger D.Va).
Whether any of these theories will end up being correct, I have absolutely no idea, but the one thing I do know is that Overwatch is getting more story content in the near future! And as far as I'm concerned, that is all that really matters in the end.