Propellerhead have announced the release date for Reason 9 as the 21st of June 2016. Reason 9 will include new Player devices; Scales & Chords, Note Echo and Dual Arpeggio. A 1000 new patches and PitchEdit for pitch and time stretching effects.
Also with Reason 9 is bounce in place, Audio to MIDI conversation and visual themes.
Reason 9 will be available from the 21st of June 2016 and if you bought Reason 8 since since May 1st its a free upgrade.
Reason 9 supports Windows 7 or later (64-bit) and Mac OS X 10.7 or later (64-bit).
More details online.