The Disney Parks Blog is reporting that DisneyQuest is expected to have it's last day of operation on July 3, 2017. The announcement also dispelled concerns about the replacement experience, "The NBA Experience at Walt Disney World."
In June of 2015, Disney officially announced a new interactive experience called the NBA Experience at Walt Disney World. The experience is expected to have interactive exhibits, retail, and dining as part of a large complex.
We have been tracking this rumor here.