From MMO-Champion:

Important - Patch 3.3.2 is not this week
After checking with a few people, I can confirm that Patch 3.3.2 will not be deployed this week. It also means that Season 8 will not start this week either, as the season cannot start without the patch.

At this point I'm not sure if it means that we will also have to wait one more week to fight the Lich King. It all depends on whether Blizzard wants to release the encounter and the new season on the same day.