I said this earlier in this thread: Sony wants the film & video archive. It's huge and fairly intact. In addition to Paramount & CBS archives, there is also RKO Pictures and Desilu. Star Trek, Mission Impossible, The Godfather. Incredible history that would now belong to Sony. The real estate is also pretty staggering. Sony currently operates from the former MGM lot in Culver City. This would add what might be the oldest studio lot in town. They'd probably sell one of them.
Combine that with Sony Music Publishing, and the RCA & Columbia record labels, and it's a lot of American culture from the last 100 years.