By the looks of the retired cues on the Predator site it looks like a 3K7 in dark stain. I wasn't aware they made them in dark stain but they did to a light or dark option on some of their Limited Edition cues, so it could be possible.
It's appears to be a fancier version of the 3K7. I assume it was a prototype that was not mass produced due to the cost. Still waiting to hear back from Predator.
Predator says it's most likely one of their prototypes,but they don't keep records of the protypes they build so they can't give any details on this specific cue.