Steve Cohen has finally laid his cards on the table. The billionaire Mets owner finally unveiled his long-awaited Queens casino plan Tuesday — revealing a sprawling $8 billion gaming center, hotel, and music venue near Citi Field that he has dubbed “Metropolitan Park” after the team’s full corporate name. The proposed entertainment playground, which will be operated with Cohen by Hard Rock International, also offers the community goodies such as 20 acres of green space and access to Flushing Bay. “It’s time the world’s greatest city got the sports and entertainment park it deserves,” said Cohen.