Sheryl Sandberg and Marissa Meyer have already accomplished more than most. I think the sky is the limit for them professionally. If they can inspire more women to "lean in," as Sandberg so famously describes it - to pursue a career and a family - that would be an incredible accomplishment. If they can, by their example as hands on mothers and high powered executives, show young women that they don't need to leave the workplace when they have children, they will be superheroes.