The Writers Guild of America has become the latest group to challenge Paramount’s $81 billion acquisition of Warner Bros. Discovery. It filed a lawsuit Tuesday that seeks to block the merger on the grounds it would cause “specific harm” to movie and TV writers in the U.S. The WGA’s complaint arrives a day after 12 states, led by California Attorney General Rob Bonta, filed their own lawsuit seeking to halt the transaction. Paramount maintains its acquisition of Warner would increase competition and create more opportunities for writers. The growing list of legal challenges could become a roadblock for the companies as they try to complete the deal.