[ToyAddict]

I've read it somewhere before that manufacturers use different parts to differentiate one line from another. So with Iron Man, who gets done over and over again between movie lines and Marvel Universe, they'll use different combos of articulation (or lack of) to be able to tell one from one line or the other. "This one has full articulation, so this is the one from Marvel Universe" or "this one doesn't have a knee bend, so this was from the movie line."

Bonus for them that lack of articulation also saves them money. I think saving money AND product differentiation is what they're doing.

Movie Thor is more easily distinguishable from comic Thor than Iron Man (for the masses I mean. . .I know everyone here probably knows the difference easily).