The White Dwarf has been looked at and revealed this week's coming releases. Included in this week's releases are the Ork Codex, Pain Boy, some objective cards with psychic powers and ork missions, and a Codex Supplement (in a limited edition set).
Please remember that these are rumors. We had heard last week that the codex supplement was going to be part of a limited edition or special edition codex release. I was hoping that it wasnt true, or that it would be available elsewhere as well.
via Archibald_TK on Warseer
Next week releases: Mek, an ugly (not in good way) Painboy, Codex, and a deck of cards (the 36 objectives card except 6 of them are Ork specific, plus 7 Psychic powers). The Gazghkull supplement is in the Warboss edition of the Codex.
Looted Wagons are in the WD, with a big fat "WD exclusive" stamp so it's pretty safe to assume they won't be in the Codex. (A Looted Wagon with a cannon appears to cost less that the cannon upgrade alone was costing in the old codex).
White Dwarf says Codex Supplement with rules, scenarios and dataslates.