Fund compliance is the only one that comes to mind. Or perhaps an entrepreneurial pursuit where you need to understand the business side of things and be able to handle contracts, etc.
Beyond that, I have always seen this degree plan as redundant. Rather, if you want to be a lawyer, you don't need an MBA, large firms won't care about that part of your education. If you just want to have the knowledge that's one thing but an MBA brings nothing to the table from a biglaw perspective. Could the knowledge be helpful in corp litigation or something of that nature? Sure, but that's not justification for a large firm to hire you as an associate.
On the other hand, jobs that seek MBA's (IB, consulting, senior corporate positions etc) don't care about your law degree. Unless of course it's a startup or something that needs a jack of all trades but that goes back to the entrepreneur angle.
Just my 2c.