While Tron and Tron: Legacy have seriously devoted fanbases, neither film has been able to become the blockbusters Disney and many fans had hoped they would be. Tron: Legacy, for its part, had stunning special effects, a killer soundtrack, and solid performance by the whole cast, but still received lukewarm reviews.
Article source: https://www.cinemablend.com/news/2552287/jared-leto-tweets-then-deletes-the-possible-tron-sequel-title