It's been a difficult ride for shareholders of this sportswear giant.Nike (NKE 0.18%) is going through an extremely difficult stretch in its corporate history. The business is dealing with soft demand trends, and it just recently announced a major leadership change.Therefore, it's no wonder this top consumer discretionary stock has dropped 13% in the past 12 months. That's during a time that saw the S&P 500 put up a total return of 35%.But I believe that Nike shares could rise 20% and head to $100 in one ye ...