Actually it wasn't confirmed or denied if or if not that was Optimus. A poster just said he thought it was Optimus...
I'm positive- well not that positive on Jazz- that we see Ironhide, Optimus and Jazz protoform. So it's just narroing down which protoform it looks like most.
So, that protoform, imo, is most likely Ironhide- since it looks like Ironhide's protoform in the trailer... at least to me.
Notice the 'shoulders' portion. Especially the two wide gaps in the chest area (blue gaps) and how that is also missing completely from the card pic.
This is Optimus' protofrom, which doesn't really resemble the one in that card. Sure, there are "some" similarities- but many, at least to me, noticable differences as well. The card protoform- imo- looks more like the protoform IH getting out of the girl's pool...
Notice that the 'shoulders' slant upwards at a near point in the Optimus whereas in the card there is no upwards slanted point.
The card could just be a generalized protoform though.
Starscream has one too apparently, but I'm not quite sure how that works in there or if that was just a toy "for the heck of it."