We are making conjecture without enough facts. Two very different possibilities exist:
1) the Hy6 was not commercially successful - there were insufficient sales, perhaps production costs (all German) too high, and its differences (WLF, great glass), beloved by some, were not significant enough to give it a significant competitive advantage.
This is typically the viewpoint from the American market, and thus one would place its odds of coming back into production as "slim to none".
2) the Hy6 was commercially viable, its advantages are supported by enough of a customer base to be viable, probably European-centric. The lack of American representation is a hindrance, but not critical.
The closure of the company is due to other pressures (old debts), and the commentary from Phase and others is all negotiating to get something for nothing.
Assuming there is enough advantage in the camera and its customer base to overcome the recent bad press, the odds of the camera coming back are "so-so".
From this vantage point, it is unclear which of these scenarios is true. My guess is that the first one is most likely, but the heart wishes for the second.
Its likely that the Hy6, like many great cameras before it, is history, sadly so. Maybe there are some leftovers....
Geoff