A fight between an upstart Spanish language TV network and Comcast Corp has provided more ammunition for critics who fear Comcast would gain too much market power if its buyout of Time Warner Cable Inc goes ahead, antitrust attorneys said. WASHINGTON: A fight between an upstart Spanish language TV network and Comcast Corp has provided more ammunition for critics who fear Comcast would gain too much market power if its buyout of Time Warner Cable Inc goes ahead, antitrust attorneys said.