I don't know of any official dates (not that I would've been privy to such, anyway), but if anything it would only be the end of "phase one". There are sure to be many more rounds I'm afraid. I can't see any good reason why there wouldn't be even more cuts in Q1 and throughout 2019.
If there was a method to the madness we've seen the past two weeks maybe I'd think differently, but the truth is, any real strategic thinking/business management (for short medium OR long term) is clearly not what's at play here.
Posted by @VFKmZTK-myd on a different thread. Think that OP is right and that there is nothing that can prevent the management from cutting more workers in 2019. I also doubt that there will be any system or logic to it like there wasn't in this round of cuts. The way that business is done at TR, at some point we just have to accept that uncertainty is a component of our jobs. Sad but true