(Willy Sanjuan / Invision / Associated Press)Mel Gibson has been dropped from a Mardi Gras parade's lineup in New Orleans after organizers said they'd received "threats" and cited safety concerns. The announcement was a quick reversal, coming just hours after the Krewe of Endymion, the group behind the largest Mardis Gras parade in New Orleans, had named him the co-grand marshal. Endymion, named after the Greek mythological figure, is the largest of the three Mardi Gras super-krewes in New Orleans. Scheduled for Feb. 18, the Endymion parade will continue with Tulane University football head coach Willie Fritz as its grand marshal. Tulane, a private university in New Orleans, upset higher-ranked USC at this year's Cotton Bowl, ousting the Trojans in a historic comeback.