All the media companies you mention with the exception of Disney are owned by much larger corporations. None of their parent companies have the growth potential like a Google, Microsoft, Apple, etc.

In the case of Mobile Web, the top Web brands are poised to crush the competition on a global level. Google (#1), Microsoft (#3), Apple (#7) are tightly entrenched at the top of the Brand-Z survey, and they’re also among the fastest rising brands. Mobile operators appear further down the list, but their presence includes some regional brands that are poised to dominate in their home markets. Vodafone (#11) and Verizon (#33) will compete globally – and so will likely get crushed by Google and Microsoft.

Interestingly, the media companies have almost no representation in the list. Only Disney appears at #23. Even the strongest media brands are absent, including MTV, CNN, Fox, BBC, etc. We can infer that these media brands will end up as a packaged feature on one of the Portals or Operators.

Read the interesting analysis at http://www.theseminal.com/2008/04/22/what-the-2008-brand-survey-tells-us-about-the-future-of-mobile/