Replacing the previous Z 565 model is the new Z 585 which is designed to produce a higher straighter ball flight than the Z 785 with more forgiveness on strikes away from the enter of the clubface.
However I’d say it’s unlikely that a new iteration of the Mini is coming any time soon. Modern fairway wood designs like TaylorMade’s M3 and M4 for example are so good and so long that former Mini players can simply find the right fit and most likely get the same or even better performance.
The TS fairways comes standard with a choice of Kuro Kage Black Dual Core 55 Tensei AV Series Blue 65 HZRDUS Smoke Black 70 and Even Flow T1100 White 75 shafts. Bryson DeChambeau won the 2018 Dell Technologies Championship with a 16-under-par total besting second-place finisher Justin Rose by two shots.