Blizzards has posted a note on the log on screen.
We encountered some issues and need to extend the maintenance. We currently estimate that all realms will be playable by approximately 1:00pm PST. Thank you for your patience.
I am speculating that we will see the next large pre expansion event. It only makes since after the popular plague. I do hope so. . I’m getting bored. . Need more fun story line driven fun.