FROM 1UP.COM:
Meanwhile, according to Total Video Games, a Conker: Live and Reloaded demo disc sent to retailers includes a brief promo image for a new Killer Instinct game, set to debut in "200X." A new KI installment has been rumored for some time.
I hope this is true or someone at Rare will suffer if this is a tease of a game that will never come out :/