I imagine that
Kamakura was meant to be a serious ninja/commando hybrid for Devils Due to groom and use a lot. Somewhat of a new iconic ninja for the GI Joe brand
That showed us how they wanted an updated Snake Eyes for the 00's by making him be Snake Eyes' protege and follow in his footsteps. It made sense, since the story in the beginning of the arc was about the Joes getting too old for this stuff.
Sean Collins has been written as a whole character and as pretty much a guy you can like, but he still hasn't reached iconic status. He could have, but I think that he's pretty much going to stay in the shadows of Snake Eyes and Storm Shadow. He had the makings to be something serious, if only he looked that way
Unfortunately Hasbro has made some funny molds of him (the Spy Troop gorilla and the AA mustard head ninja) and the vvv Kamakura was okay
Here is a simple try at giving him "that look"
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Kamakura 1!.JPG [ 174.28 KiB | Viewed 841 times ]