Despite uniting nearly 5,000 signatories against the Paramount – Warner Bros . merger, Mark Ruffalo is fighting just as hard for those in Hollywood who wouldn’t sign the recent open letter . The 4x Oscar nominee recently noted that there is “a deep, ugly and pervasive fear of speaking out” in the entertainment industry right now, as many “were afraid” to sign his letter urging state officials to block the hostile takeover. “This plan is already in motion,” he and American Economic Liberties Project director Matt Stoller wrote in a New York Times op-ed. “Within weeks of Paramount winning the bidding war for Warner Bros., we helped bring together a loose coalition of civil society groups, unions and actors, and this coalition enlisted over 1,000 artists to sign an open letter indicating our support of state attorneys general efforts to block the takeover.…