I will admit that my interest in this story mainly stemmed from the header image which I saw out of context and thought maybe there was a He-Man game about Skeletor having a clone army. BUT! it is infact the news that Street Fighter V [official site] is finally getting that promised story mode as a chunk of free DLC at the end of June for those who own the game:
"The SFV Story Expansion is a 3~4 hour experience titled “A Shadow Falls” and will be released at the end of this month as free DLC to all SFV players. The 5 chapter story takes place between Street Fighter IV and Street Fighter III and bridges the events that happen in between the two stories. This is the first time in franchise history that fans will be able to play through this type of cinematic experience in a Street Fighter game."
So it's Street Fighter 3.5ish and involves a big old conflict between Shadaloo and the World Warriors.
Here's a bit more in the way of detail:
"Seven “Black Moons” are deployed by Shadaloo, granting M. Bison unimaginable power and enveloping the earth in total darkness. Seeing the moons mysteriously appear in the sky, Ryu, Ken, and Chun-Li embark on an epic journey around the world to retrieve fragment pieces that are the key to stopping the “Black Moons” before it’s too late. Along the way, they encounter the rest of the World Warriors, each of whom have their own agendas and motivations in mind. The final battle between good and evil begins now… who will RISE UP?"
The story mode will also act as an opportunity to play several characters ahead of their release into the wider game (Balrog, Urien and Juri) although they're being caveated as not the definite final iteration of those characters. Essentially they mgiht get tweaked a bit more before their full release so don't take them as tournament-ready and start mastering them assuming nothing will change.
There are also some changes to the way the in-game currency system works including the axing of Zenny. Zenny was the proposed real-money option where you would use actual currency to buy Zenny for use in the game as opposed to the Fight Money which you earn by playing. That doesn't mean microtransactions are going away, just that you'll pay for things directly via the Steam purchase system instead of performing the intermediate step of buying Zenny.
For further info on the June update there's a roundup on the Capcom blog.
And for those who were more excited about Skeletor: