I think there’s something to be said for starting a story early and then removing the beginning. I’ve been struggling to find the right place to start Horror Movie and I think that’s achieved by cutting out the first chapter. The good parts can be put in the story later, while the boring parts aren’t required.
This way, the story starts with things in motion, and the characters are clearly doing things which result from the events of those deleted scenes. This is similar to a problem I’d often see when editing indie movies, where a scene would begin with actors standing there doing nothing. In the real world, they would have been doing something beforehand, but the director hadn’t thought of what that was. Often I’d cut the beginning of a scene and get into it when the action was building up.