Nick Fury

Matt and Spencer are correct. Samuel L. Jackson is Nick Fury.

Now that I've got that endorsement out of the way, a side note. Someone really should make a Marvel Civil War movie. Not only is Civil War a fantastic universe that showcases a bunch of characters in innovative ways, it's a terrific examination of government power. The Commission on Superhero Activities, the Registration Act, etc., would all require major federal efforts and oversight. And if Marvel ever decides to go ahead with the project, I am SO available as an on-set consultant on government operations.