Capcom made the official Street Fighter V announcement 3 days ago on 2014 PS Experience in Las Vegas. The game is announced for Windows and PS4, and will feature cross-platform gameplay. PlayStation will have the console exclusivity.
There are already very strong rumors and indications that SFV will include some kind of a story mode, which would be a huge addition to the game.
Here are the official announcement and gameplay trailers:
For further speculations, rumors and up to date info, I recommend you to check Capcom-Unity and SRK.