I thought you might enjoy reading a few of the previews that have been put together for Update 17, in case you haven't seen them yet. I'll add to this list when I have more links to share:
Ten Ton Hammer
Massively has some cool screenshots!
MMORPG looks at Update 17!
MMOReporter video preview!
Also, don't forget to check out our preview of Return to Gianthold here!
NOTE: Story and raid spoiler alerts within!