Sure there's the little legal matter of SEC Division of Corporate Finance Bulletin 14. That mandates that the board of directors has to ensure succession planning. But research by Heidrick & Struggles and Stanford University's Rock Center for Corporate Governance found that the average time per year boards devote to succession planning is 2 hours.
There will be growing legal work here on matters of governance. After all, consider the high churn in CEO jobs.
I take a look at CEO succession for the financial information powerhouse Motley Fool. Here you can read all about it. Maybe you will get ideas how to develop or expand your practice to capture some of these opportunities.