My gut feeling about sequels is that they should be premeditated: You should try to write a trilogy first or at least sketch out a trilogy if you have any faith in your film.
All growth is a leap in the dark a spontaneous unpremeditated act without benefit of experience.
Corporations often partner with government after natural disasters as many companies did in the aftermath of Hurricane Katrina in 2005. As a rule however long-term civic/corporate partnerships are still rare .But this need not remain the status quo as many opportunities are available for such partnerships.