Rebecca Rubin Film and Media ReporterMattel, the popular toy company, intends to turn yet another children’s game into a big-screen extravaganza.The company’s film division has announced plans to develop Rock ‘Em Sock ‘Em, the tabletop game featuring battling robots, as a live-action movie starring Vin Diesel.“To take the classic Rock ‘Em Sock ‘Em game, with Mattel as my partner, and align it with the kind of world-building, franchise-making success we have had with Universal, is truly