You may recognize D'Onofrio from Law & Order: Criminal Intent and Men in Black. He also has a role in the upcoming Jurassic World film.
This is absolutely perfect casting in my mind. Too many people, in their fan casts for the role, just go with someone who is overweight, which is not actually central to Kingpin's character. Honestly, could you really see John Goodman playing the role? Goodman is awesome, but he couldn't pull off the physicality of it. D'Onofrio can make for quite an intimidating presence, and you can't deny the resemblance in the picture above.
It blows my mind that I never thought of this before, as it seems like such an obvious decision. Kudos, Marvel!