I get asked this question a lot. Besides a family movie what else can we watch? For families that want to gather their friends and neighbors for an experience that everyone will enjoy I highly recommend Disney Nature Documentaries. These movie are absolutely stunning to watch outdoor on a big screen with a high quality projector. The imagery, the story and sound are absolutely stunning.
Another idea is watching a sporting event. Basketball playoffs, Super Ball, Soccer, Boxing, UFC. The experience is simply amazing and you can share it with dozens of your friends and family members.
When you think of an outdoor movie experience the possibilities are endless.