Corus Entertainment has fired back against Catalyst Capital, which has raised concerns about Corus' planned C$2.65B acquisition of Shaw Media and proposed to terminate an outstanding Corus subscription receipts offering for what Corus calls a "hypothetical" rights offering. Catalyst had complained to regulators with concerns that the Shaw family -- which controls both Corus and Shaw Media parent Shaw Communications -- could reap C$50M just for making the deal happen.