VANCOUVER, B.C. - This city is in the throes of playoff hockey ecstasy, and agony. The Vancouver Canucks are in mortal secondround combat with the powerful Anaheim Ducks. Unbeknownst to many Canucks fans, there is another battle brewing, with more at stake than bragging rights and silver trophies. On the line are family connections, closely guarded business secrets, and a $250-million prize: Control of the 35-year-old NHL franchise itself, and the 18,600-seat, profit-churning arena where the team plays. A bitter ownership dispute between two wealthy Vancouver families goes to trial on Monday in the Supreme Court of British Columbia. In...