Zaha Hadid design for the 80,000-seat stadium was selected by the council on Nov. 16, 2012. Later the this design was rejected because of cost and on Tuesday, Dec. 22, 2015 the Japan Sports Council announced a newly selected design by Japanese architect Kengo Kuma.
Hadid's office submitted a document to the Council explaining the similarities of "the structure, layout and numerous elements" between ZHA's original design and the latest.
Unfortunately, is not uncommon for governments or large corporate organizations to bully designers into getting their way by withholding payment.
Original story here.