It would be very interesting if he released a OB-X* drop-in voice card and/or CPU board replacement–that would open up a lot of possibilities for folks who have less-than-eight-voice (or six, in the case of the OB-SX) units. It would also extend the lives of these products well into the future. Ultimately, though, that's a selfish request on my part, and it may not be viable without changing the behavior of the envelopes / LFOs (i.e., match them to SEM-style behavior, rather than software-generated as used in the Relic).
There are also a lot of (admittedly niche) business / product opportunities for older vintage* units that, I don't feel, often get the attention they need–say, replacement key-assign electronics for Four- and Eight-Voice chassis, etc. Even as small-run projects, it has been shown that (well-heeled) owners are willing to pay for faithful, non-destructive modifications to improve the functionality and robustness of older units.
* - Marion Systems may be looking for someone to help out with a Four-Voice or Eight-Voice reissue, for example.