Michael K. Williams' family is convinced a posthumous Oscar and Emmy is in the cards ... based on not-yet-released projects he starred in before his tragic passing. Dominic Dupont, Michael's nephew, tells TMZ ... while the family's bummed Michael didn't win outstanding supporting actor in a drama series for "Lovecraft Country," they're hopeful a few upcoming projects could clinch him the coveted gold statues. We caught up with Dominic after the Emmys and he told us he was bummed his uncle didn't get an Emmy (it went to Tobias Menzies for his portrayal of Prince Phillip in "The Crown"), but he told us he very much appreciated Kerry Washington's gesture in honoring him onstage.