'Space Jam' Star -- Sequel Should NEVER HAPPEN ... 'Cause LeBron Ain't Michael

Anyone hoping for a "Space Jam" sequel (all four of you) is about to be seriously bummed ... 'cause one of the movie's stars is telling TMZ Sports why it should NEVER HAPPEN, and it's all about LeBron James.Thom Barry -- who played MJ's dad in the…

Sunny Mabrey Susan Ward Susie Castillo T.A.T.u.