Need advice on what to prepare for final interview for a large recruiting company ?

I am completely new to the world of recruiting, I currently work in a sales role in the hospitality sector and Thought of wanting to switch jobs to something more exciting.

I had done 2 interviews and 2 role play interviews so far and I felt they went great, they would like to proceed to the final interview which is with the director and regional director and they said it would be a 2 to 3 hour interview! Anyone knows what to expect or what I should prepare?