They have been planning it for a while - They will be bringing it back when they revamp the IPL line to compete better with AMG, ///M, etc. a few years down the road. Consequently that lines up with the new QX70 remodel coming out, and there are rumors that the QX70 may receive a true sport-SUV treatment down the road as well. This is all after them come out with a smaller 4cyl coupe to try and act like the other luxury lines and have a car for each segment....
These are "overheard rumors" from somebody I know who is "in the know"