You have entered fighting game mode, huh? XD
I think there are some rumours of a new Darkstalker game coming up, but there have yet to be any word of a Killer Instinct 3. I loved the Killer Instinct games though and I would love to see it return, Orchid and Jago being my favourite characters. ^^
Note: I thought Super Street Fighter 4 was quite good actually.