When thinking about a marketing campaign or any piece of work a hallmark type of question to ask is simple:
How can I make this iconic?
How can I add my own creativity to it?
How can I make it timeless?
If I can't - is it worth it and why?
Everything that you create well either add or take away from your legacy. These are little pieces of your life that people will remember you for (or not remember you for).
Questions like this not only expand your thinking but they allow you to leave a legacy in your field.
When in doubt of what to do with your next project - try making it iconic.