I think its actually next year...They didnt want to overshadow the map pack
"Comprised of three brand new Halo 4 Multiplayer maps (Wreckage, Harvest and Shatter), the Crimson Map Pack will launch on December 10. A mere seven days after that, the Halo 4 Infinity Challenge officially begins. To give you adequate time to enjoy both, Spartan Ops will go on a mid-season break starting December 10. Fret not, though, because your entire Spartan Ops timeline will still be both accessible and playable. On top of that, we will also be featuring a Best of Spartan Ops compilation next week, made up of the following chapters: Core Chapter 5 of Episode 1 Hacksaw Chapter 3 of Episode 2 Shootout in Valhalla Chapter 4 of Episode 3 The Didacts Gift Chapter 5 of Episode 4 Spartan Miller Chapter 1 of Episode 5"