Here's how I see it:
In the wake of The Kingpin's arrest, an all out gang war insues to atain his territory, with Hell's Kitchen and it's citizens caught in the crossfire. Amung the gang leaders, we should have:
The Owl, a crime boss who's had his body surgically altered to have bird like characteristics.
The Rose, Wilson Fisk's estranged son.
Mr. Fear, a boogyman like figure within the criminal underworld. Think of Batman, make him a gangster instead of a vigilante, and give him The Scarecrow's gas, and you get the idea.