Disney says the cancellations are necessary because of the capacity restrictions aimed at limiting the spread of the COVID-19 virus.
Busch Gardens Tampa Bay's reopening plan doesn't include a proposed date for welcoming back guests.
The reopening will start with Magic Kingdom and Animal Kingdom on July 11.
Both parks will present their plans at an Orange County task force meeting that begins 10 a.m. Wednesday.
Disney confirmed that discussions were talking place, noting its "great, long-standing relationship with the NBA."
The reopening will start with a team member preview on June 1 before opening the theme parks to the general public on June 5.