Cheap Eats in Houston pointed me in the right direction to find out the details on the Grand Opening promotion that is happening on April 29 at the new Chick Fil A location on Rayford-Sawdust. Show up at 6am (not earlier than 5:30am). If there are less than 100 people. Everyone gets "free food for a year:" 52 coupons for a chicken sandwich, medium fries, and medium soda.
If there are more than 100 people, then there is a raffle to see who wins. Here are the complete details from their website. You have to stick around during the counting and giveaway period.