Here is an email addressed to the Yahoo PSR Styles forum:

Latest news on the new Tyros !

A full package of new styles will be introduced.
The Brass and Stringe section will be
megavoiced.
New features will be added ( I do not know the details yet ... will come
soon ).
Do not ask me how I have received this information but believe me this
information is absolutely correct.
I gave my word not to talk about my source.

Best wishes, Jeff /The Netherlands