I've got a supervisor - not a topic!

I was pretty excited to have been notified this week that I have been appointed a supervisor for my Master of Educational Leadership theses. The really cool thing is I already have a relationship with my supervisor and we have an initial meeting scheduled for tomorrow afternoon. I am in the throes of reading everything I can to gain some clarity before our meeting tomorrow. I have a supervisor but haven't finalised my topic. I had a fair idea of what I want to focus on, but as you may be aware "the more you know (read), the less you know". Wish me luck for my meeting tomorrow :D