There are now leaks coming in of a single page out of a White Dwarf showing new units for the Imperial Guard and what appears to be a new codex. The name of course is Militarum Tempestus, and it includes a Tarox Prime transport of sorts, Scions which look to be veterans, and a codex. These are set for a pre-release date of March 29th, and release of April 5th.
Of course until these are officially released, always give them a little salt. These are still considered rumors.
I am not sure yet what to think of this new vehicle, as at first glance it appears very blocky. I suppose we shall see, once we get a better look at the beast. The Scions look good so far as does the cover of the codex. I am concerned a little on the hardback only being 72 pages though.
Here are the releases listed in the pics
Miliatrum Tempestus
Tarox Prime: 1 model $48
Scions: 5 models $35
Codex Militarum Tempestus: hardback 72 pages $49.50
via G8Keeper on Warseer
http://www.warseer.com/forums/showthread.php?389302-New-IG-Astra-Militarum-Ogryns-spotted!/page13
http://calthburns.blogspot.com/2014/03/something-new-for-imperial-guard.html