I'm wondering if Red Skull has ever appeared in a form similar to Onslaught's, in the comics or video games. Essentially, any media other than this toy:
If so, that answers my question.
But if not, I'm trying to figure out why this figure was ever marketed as Red Skull. I've a hunch that maybe the rights to Onslaught weren't clear at the time (perhaps because of the Marvel vs. Capcom video game?).
In a later toy wave, a different figure almost randomly included an Onslaught head, which is interchangeable with the Red Skull to form a complete Onslaught:
However, this head was included with no explanation (no mention on the box) and none of the materials anywhere seem to officially call the figure Onslaught, still. Despite the fact it's clearly Onslaught:
So, what gives? Did Red Skull ever wear armor like this? Did Hasbro just not have rights to make toys of Onslaught because someone else does, so they couldn't officially make an Onslaught figure? If so, any idea who does have the license to make Onslaught figures?
For reference, this figure was revealed in late 2015 and hit retail early 2016.