It is barely ninemonths since MrFreston, a hugely respectedmediaexecutive who presided over theglobal success ofMTV, became bossof Viacom when Mr Redstonesplit his empirein two.
Redstone is also infamous for keeping a revolving door at Viacom, ousting Viacom chief executive Frank Biondi in 1996 and firing Viacom chief executive Tom Freston a decade later.
Whether or not the new Viacom will be able to meet Mr Redstone's high expectations will also depend on Mr Freston's ability to turn around Paramount Pictures, which has had few hit movies in recent years compared with other studios.