The 1990 Hawthorn Football Club began the season after winning the championship game against what club?
1990 Hawthorn Football Club season:  Hawthorn entered the season as the two-time defending AFL Premiers 1989 VFL Grand Final: The 1989 VFL Grand Final was an Australian rules football game contested between the Hawthorn Football Club and the Geelong Football Club, held at the Melbourne Cricket Ground in Melbourne on 30 September 1989.
Geelong Football Club