In college basketball, the biggest question marks for teams often revolve around replacing lost talent. Between players leaving early for the NBA draft or seniors graduating (or even transferring), rosters get reshuffled every season.
Northwestern should not really face those kind of questions in 2017-2018. With their top five scorers and six of the their top seven minute-getters back, the Wildcats are a seasoned, experienced bunch. Sure, there are questions on the court, even about the returnees, but, in the grand landscape of NCAA hoops, we know a great deal about Chris Collins's team on the court.
Where we don't know as much is off-the-court, where Northwestern will have to deal with some wacky circumstances.