There is much promise in decentralized, block-chain type of technologies to combat this problem.
We could begin to collect news, data and information in a more transparent manner by incorporating these technologies, IMHO.
What if news was collected in open source, transparent manners, that is not manipulated by a central source?
It would require a whole transformation of the current trends of the Internet.
Centralized news can then be manipulated in masterful ways, especially with new advances in the centralized social media systems.
De-centralized systems might be our only hope.
Also, the Sherman Anti-Trust Act is still the law of the land. If our government would simply enforce it, we might break up some of the concentration on that front too?