Mixer Question to Pionner developer

The DJM-S9 is a mixer created originally for Serato but I believe it now support Rekordbox DJ software. If this is the case I guess there will not be a mixer version of the S9 that is closer in operation to features found in the Rekordbox software? Also If there were to be a new version of the S9, will the new mixer allows or will have the capability to control deck 3 & 4. and independent buttons for silent cue, key shift, and slip mode as well.? And Last will you be able to pre-listen the track on the browser window thru the headphone as well as pre-listen the track with the effect active that you may select over the headphone.