If you watch the standard definition version of the video at 2:57 some "D" word pops up in the game when subzero loses, but in the HD version it says Scorpion Wins, both words are also in completely different fonts and if you watch till around 2:59 in, standard, you see during that time that the word was shown, it was just sitting there as if it was edited in..... I believe this is what Ed Boone was talking about, what is that "D" word..... maybe its a random assortment of letters that if arranged is the characters name.
HD
http://i619.photobucket.com/albums/tt274/web872/hd.png Standard
http://i619.photobucket.com/albums/tt274/web872/Non-HD.png If you zoom in you can defiantly see that its not the same word...