Hi, I applied to marquette last cycle and I and other friends of mine who applied there did in fact have to go to an interview. To give some background I was an out of state applicant with high stats. the letter i received from them stated that starting last cycle they would be implementing a formal interview process. so to answer your question i believe that you will have to do an interview if they are interested in you after you return your secondary application. and yes the paper asking for an essay about why you want to go to marquette is the secondary 🙂