Unlike the competitors with annual updates (...and more??) Titleist has everything on a 2 year cycle.  Metals (driver, fairway, hybrids) were released to market in November 2014 as the 915 models.  Next release - late 2016.  The irons are due at the same time in 2015 (716 models).  I haven't discerned a release pattern for Vokey wedges and SC putters.  The Wedges may be on about the same 2 year cycle as the irons.  The balls are also alternated, so the urethane balls (Pro-Vs) came out in January after the PGA show, and the Surlyn models will be due in January, 2016.  Not sure what Titleist has planned for the 712 U driving irons.