Ya know, my older brother's friend suggested that if out theme this year doesn't go well, that we should have a bunch of zombies in the front yard doing the Thriller dance.
Personally, I think zomibes cannot stop themselves from doing the Thriller dance when they hear the song. It's like people at weddings and the chicken dance.
As for popular costumes, there will be the old favorites (scantily clad girls, movie inspired, etc) and maybe some inventive costumes inspired by Tim Butron's up coming films.