Release date for Installshield 2015?

Hi there :)

I'm looking to upgrade our Installshield projects, which are currently in IS2013. Does anyone have a firm release date for IS2015? I would prefer to upgrade to the latest version, but I need to make the decision soon, so if 2015 is still some time away, I'll upgrade to 2014 instead.

Thanks for any information you can offer!

Cheers, Don.