I'm not familiar with the PSAC deal. It seems though that they did pretty much what Carbon Ion was trying to do with COUV. COUV is just a shell. Carbon Ion was looking for a quick way to go public and that's what a merger with COUV would have done for them.
If COUV were able to relatively quickly respond to the SEC halt and start trading again the deal could still possibly go through. But, unless Carbon Ion was the reason for the halt, they are holding all the cards including the law firm and auditor connections that could help resolve the issues.
It will be interesting to see what COUV discloses on Monday. If they are transparent and can explain the SEC's concerns and defend their actions there still may be hope for shareholders to recover. On the other hand we might find the SEC's charges to be more serious than we thought. Right now we just don't know enough about why they were suspended to draw any conclusions.