but uhh if you don't know what theme should be for trick or treat i got a few ideas: your costume knocking on somebody's door with your bag of candy saying "trick or treat"

HOLY FKIN SH*T I DIDN'T REALIZE THAT MUCH PEOPLE JOINED OVERTIME

srry forgot to tell this is teams =w= so basically you join one side and you help that side participating in both teams and individually so you get to choose one side: trick or treat