Expectations when contacted by an acquisitions editor about a course I teach
I would probably ignore such a message, but if you want to know what to expect from a hypothetical meeting, I suggest asking the person who emailed you, since they weren't very specific. Why do they want to know about your course? What's in it for them, and what's potentially in it for you? If they can't or won't give you clear answers to those questions before the meeting, you can conclude they are not worth your time.