The Chaos Chosen page got updated today to include all the new information about the Career, along with several new images. Here's a peek of what's new:

Tzeentch expects his Champions to be both ferocious warriors and cunning tacticians. As a result, Chosen who excel in these areas are granted profane rewards. These Dark Gifts allow the Chosen to manipulate the ruinous power of Chaos itself.

You can find the Chaos Chosen overview page by Clicking Here.