We just had a discussion about this today on another thread. One of the DSI staffers said on this forum that they will not be producing a purely digital instrument. So, that leaves the all-analog and the analog-digital hybrid instruments as possibilities.
In light of the fact that they already have a large-scale hybrid instrument in the Prophet 12, I would like to see DSI produce a large-scale analog polyphonic synthesizer, something that surpasses the Prophet '08. If I could dream just a bit: everything the P'08 offers, plus four VCOs instead of DCOs, onboard delay, a high pass resonant filter, a program keypad, long envelope times, and a higher-quality five-octave keyboard. I realize this would be an expensive instrument, so that I'd actually be willing to compromise with DCOs in order to keep the price down. However, it would need to be substantially different from the Prophet 12 in order to be justifiable, and having VCOs would achieve this. Either instrument would be my dream music machine.