The creators of “South Park” and Reese Witherspoon probably aren’t often discussed together, but both recently closed $900 million deals. Trey Parker and Matt Stone, the “South Park” creators, signed a deal with ViacomCBS that runs through 2027 and guarantees 14 new “South Park” movies for the streamer Paramount+. Witherspoon’s company Hello Sunshine sold to an unnamed company run by former Disney executives Kevin Mayer and Tom Staggs.