All eyes may be on the Labor Department’s fiduciary rule, but don’t forget the courts.Eleven major class-action lawsuits were filed in federal courts around the country against 401(k) sponsors or providers of retirement products in the fourth quarter of 2015. All involve alleged fiduciary breach claims of, among other things, excessive fees benefiting service providers in violation of the Employee Retirement Income and Security Act of 1974 (ERISA).Most of the defendants are industry brand names, including Allianz, BB&T, Deutsche Bank, Fidelity, Insperity, New York Life, Prudential, Putnam and