By Christian Davenport and Drew Harwell, The Washington Post AT&T has reached a deal to buy Time Warner for more than $80 billion in what would become a colossal corporate merger, the Wall Street Journal reported Saturday. In what some analysts are calling an unprecedented “seismic shift” for the media and technology world, the deal could turn the legacy telecom carrier into a media titan the likes of which America has rarely seen. A combination between the two companies could rival some of the biggest mergers in history, with AT&T potentially gaining control over hugely valuable brands spanning television, film, sports, news, video games and mobile and residential Internet service. The tie-up could see AT&T gain ownership over a dizzying array of household names.