I'm sure Railking/MTH tooling will live on in some way shape or form. If not as one company maybe spread out through the industry. The big question is if whoever acquires the tooling will continue to use the DCS platform or go with something else.
If MTH does not survive as a whole, I think the best option would be for someone to purchase the Railking line. Railking produces some very nice semi scale models that are affordable, for people that prefer grater detail then available in some starter sets. If Railking were to survive and use its current operating system, then DCS would have a sustainable market for its electronics. Otherwise, I don't see a very bright future for DCS.
I don't think there's much value in the premier line, as Lionel, 3rd Rail and Atlas already produce models with detail that is equal to or greater them Premier. This includes rolling stock as the above manufactures also make nicely detailed cars. There are exceptions of course the European models being one that are still in demand and would fit in well with Lionel or 3rd Rail offerings.
But as Rich Melvin states "The bottom line is if the numbers don't work, there is no viable business".
I have a number of MTH products and would hate to see them completely gone, but in the end it's up to Mike Wolf. Is he willing to negotiate a reasonable price for the company?, Would he be willing to sell it off in parts?, Is he willing to sell off the tooling? Would he want to company to go on without him?
Remember, MTH has its fingers in a lot of different pies, aside from the O gauge offerings, there's Tinplate, Gage One, S Helper, HO and all the building and accessories. One would think that someone would want at least some of this, maybe operating on DCC instead of DCS.
Only time will tell.