Wizards has posted details and pictures of the Worldwake Fat Packs here:

Worldwake Fat Pack : Daily MTG : Magic: The Gathering

Reading from left to right, there's a handsome storage box, the Worldwake Player's Guide (featuring a familiar Planeswalker on the cover), forty Zendikar basic lands (the kind without the text box), the wrapper, a sample chapter from Robert B. Wintermute's In the Teeth of Akoum, and eight Worldwake booster packs.