Netflix also has a new Amy Shumer and a Dave Chappelle standup special coming out. They're taking over in lots of areas.
Yes, and Amazon studios is producing a lot of stuff.
The reality is that many of these media companies aren't all that big. Viacom owns CBS, Paramount and others, yet it's revenue is only about $12.5B. Time Warner $28B (including the cable and other business plus HBO). 21st Century Fox around $21B. MGM studios is private, didn't find the revenue.
Amazon has revenues of $136B. Look for Google to get into the content business soon too. These companies can take greater risk, and can more easily monetize the content through their own distribution system. Every movie or show Amazon or Netflix makes, is one they can keep from each other.