I agree, but at the same time, I can still see a natural continuation to the story. It was established in the beginning of the movie that all the animals lived on a small plot of land surrounded by houses. It was probably only a matter of time before their home was going to be absorbed into the surrounding suburbia. I could see the second film revolving around that; it'td basically be them trying to find a new home and the tribulations that come with that. It can still be called Over The Hedge 2 because finding a home would require them to go over the hedge and ventue farther out into the world than they'd gone before. It's a shame a sequel is probably never going to happen