It's not just major broadcasters who are willing to take their fight against Aereo to the Supreme Court. The MLB and the NFL have jointly filed an amicus brief supporting the existing court case, arguing that the streaming TV service jeopardizes their licensing deals. Aereo's ability to offer sports programming at no extra cost undermines the point of exclusive (and very lucrative) broadcasting arrangements, according to the brief. The leagues are prepared to back up their words with deeds -- they claim that they'll have to move their games to cable and satellite channels if Aereo wins. There's no guarantee that the Supreme Court will sympathize with this supposed plight, but it's clearer than ever that Aereo faces stiff opposition from the broadcasting industry's status quo.