Source: LA Times
Samuel L. Jackson, who had a cameo as Nick Fury in Iron Man, told the LA Times that negotiations to return to the role in future Marvel Studios films have broken down. Jackson had the following to say:
"There was a huge kind of negotiation that broke down. I don't know. Maybe I won't be Nick Fury. Maybe somebody else will be Nick Fury or maybe Nick Fury won't be in it. There seems to be an economic crisis in the Marvel Comics world so [they're saying to me], 'We're not making that deal.'"
Geoff Boucher at the LA Times had this to say:
I called Marvel Comics and they gave me a statement that suggested that they still want to see Jackson wearing the eyepatch. "Marvel does not comment on active negotiations," was the boilerplate repsonse, but there was that emphasis on the word "active" in the voice of the spokesman who phoned me back.
You can read the full article here