There’s no particular deadline for CBS to respond to Time Warner Cable’s offer to carry the network-owned stations on an a la carte basis, says Rob Marcus —  who will become TWC’s CEO at year end. But he hints, in an interview on Bloomberg Television, that TWC is prepared for a long fight over program carriage terms. He wouldn’t predict, as Cablevision CEO Jim Dolan did, that video may be expendable for cable companies as they concentrate on broadband. Still, Marcus concedes, programmers and operators have “a difficult dynamic.”