The second lens to be announced by Tamron along side the SP 85mm F1.8 Di VC USD will be a 90mm F2.8 Di Macro VC USD lens. It will be available in Canon, Nikon and Sony mounts. What would be upgraded over the current version is unknown at this time.
The current version currently has a $150 instant rebate until February 29, 2016.
The lenses are scheduled to be announced of February 22, 2016 ahead of CP+ in Japan