Comic-Con bid a bittersweet farewell to "The Twilight Saga" this weekend as "Breaking Dawn - Part 2" marked the series' fourth and final panel at the convention. It was as hard for the cast to say goodbye to the franchise as it was for the fans, and Summit sent "Twilight" off with a bang in San Diego. In honor of the series' dominance of Comic-Con for the past five years, MTV have pulled…