The full trailer for Killer Instinct Season 3's newest addition, Arbiter, is out. For those whose don't know, he's the "elite" bad guy with the laser sword from the halo series. 

Sure, he looks awesome in the new trailer (below), but why not Master Chief? This would have been THE game to have him cameo in. It keeps him exclusive, and won't break away from the Halo universe like him being in Mortal Kombat 9 would have. 
Well, we can only hope that someday we get to beat the crap out of someone with Master Chief's cold Halo hands.