Media mogul Sumner Redstone is preparing to replace a handful of directors on the Viacom board, a move that is expected to reshape the board and end with the firing of the current chairman Philippe P. Dauman, The New York Times reports. Kenneth Lerer, the co-founder of the Huffington Post and chairman of Buzzfeed as well as Sony executive and lawyer Nicole Seligman are among the people in consideration for board positions.