NYCC News: At the Marvel TV panel at the New York Comic Con Joss Whedon appeared via video to announce that he and Marvel are developing a live-action S.H.I.E.L.D. TV series, and that Clark Gregg, who plays Agent Phil Coulson in the Marvel movies (and shorts), will be, according to Whedon, "headlining the S.H.I.E.L.D. show…

