Today at Gamescom in Germany BioWare have announced their next story-driven rpg named Shadow Realms. Bioware have said the game is an online focused 4v1 game. Four players will work together to take down a player controlling something called the Shadow Lord. They describe it as a "story-driven online action rpg".
It will have a "continuously updated story". They have said that the story will be released episodically like a TV series. The game has a "modern fantasy" setting with BioWare trying to ground the look of the heroes in reality.
BioWare has said the will be released late next year on PC. You can also sign up for the Alpha on the official site here.
Source: Shadow Realms Site