Dr. Marco Langbroek, with an intriguing post about the upcoming NROL-71 payload:
So, if NROL-71 is a new electro-optical reconnaissance satellite in the KH-11 series, it represents a serious deviation from past KH-11 missions. The apparent abandoning of a sun-synchronous polar orbit, is surprising, as such orbits are almost synonymous with Earth Reconnaissance. The “why” of a 74-degree orbit is mystifying too. If it does go into a 74-degree inclined orbit, it doesn't seem to be a “Multi-Sun-Synchonous-Orbit”.
Alternatives have been proposed. Ted Molczan has for example suggested that, perhaps, NROL-71 could be a reincarnation of the Misty stealth satellites, warning that the unexpected orbital inclination for NROL-71 might not be the only surprise.
Strap in for a fun ride, because Misty is a hell of a good story.