ABC is calling upon the big green guy to usher in a new holiday tradition, developing a half-hour animated special based on Shrek, and featuring the voices of Mike Myers, Cameron Diaz, Eddie Murphy and Antonio Banderas. The special will pick up where the forthcoming Shrek the Third feature leaves off, and is set to debut in December 2007.... Per Variety, FX has picked up It's Always Sunny in Philadelphia for a third, 15-episode season, to premiere next summer.... CBS has given a pilot order to an ensemble drama about a team of public defenders, from Law & Order/ Numbers vet Barry Schindel.