From: http://www.fullmetalhero.com/content...us-prime-1029/
Looks like another retool of Leader Class Optimus Prime, with new MechTech gun and shield (apparently).
Update:
http://www.tfw2005.com/boards/transf...more-info.html
Apparently, this toy may have three modes - robot, vehicle and Stealth Force.
Evidently, TakaraTomy were displaying a mock up box for this figure (says Ironhide on the side and vehicle pic isn't part of the packaging proper) that somebody accidentally managed to get into frame.