The long-in-development Riddick is finally closing in on its start date.  Producer and star Vin Diesel has been keeping fans updated by posting on his Facebook page and sharing pieces of concept art.  Yesterday, Diesel showed off some concept art for Necro-armor.  As you may recall from The Chronicles of Riddick (or not, which is fine because it's not a good movie), the Necromongers are the bad guys and they'll be factoring into the plot for the upcoming sequel.  The concept art is only one design for the Necro-armor and it doesn't look like it will be used since Diesel commented, "Haha, I had to share."  Diesel added the movie "starts principal photography in weeks" and re-confirmed the R-rating.

Hit the jump to check out the concept art.  Riddick also stars Karl Urban.

Concept art via Vin Diesel's Facebook page.

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