alternatehistory.com

I had difficulty thinking of a proper title, so I hope this one makes sense. Anyway, here goes:
http://tvtropes.org/pmwiki/pmwiki.php/WhatCouldHaveBeen/LiveActionTV
The original press information for Stargate Atlantis included a scientist called Dr. Benjamin Ingram, African Canadian. They brought back Dr. Rodney McKay from SG-1 instead.
So my question is how would the show's popularity and profitability be impacted if they went with the original idea & had a black academic-genius "Dr. Benjamin Ingram" as part of the main cast? Would it have any impact on the stereotypes of black people in the media? Would other shows follow suit? Given the rarity of interracial parings in fanfiction, would this casting choice greatly diminish the amount of John/"Rodney" slash fanfiction the OTL fandom is full of?

What if they went a step further, and made Dr. McKay's character a Canadian Native American? Which actor would have been best for that role?
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