According to a recent rating from Korea's Game Rating and Administration Committee (via Polygon), the original Killer Instinct 2 - the arcade fighting title from Rare back to 1996 - could appear on Xbox One.
In that document, reported by NeoGAF, the game is named Killer Instinct Classic 2 and it is listed for Xbox One, following a similar naming of the previous release, Killer Instinct Classic, that it was included in the Ultra Edition version of Double Helix's Killer Instinct reboot (2013).
It isn't confirmed if this re-released will come alongside Killer Instinct's second season, but the fact that Maya (a character from the original Killer Instinct 2) will be playable as fighter in the second season, it suggests something similar may be planned.
More details as they appear...