Four things to look out for as ViacomCBS comes to life

It ultimately took an extraordinary set of circumstances to clear the way for the reunion, but after three years of hemming and hawing (and the headlines-grabbing ouster of Les Moonves), CBS and Viacom have at long last agreed to a merger. The deal will bring together the CBS, Showtime, MTV, Nickelodeon and Paramount Pictures brands, among many others, under a single entity known as ViacomCBS.In effect, today’s agreement undoes the 2005 split engineered by Viacom Chairman and CEO Sumner Re