CS will not be transparent with employees if the plan is to shutdown HN. They will quietly dismantle it until it is totally gone. Employees will only know the extent of the layoffs, etc. via the grapevine.
The only time I have seen a corporate entity be transparent with employees about a shutdown is after an acquisition announcement. At that point, typically a retention bonus program is setup to help with an orderly transition or shutdown. The affected employees can openly search for a new job and know the desired timing. They can also decide if the retention incentives are sufficient or if they are better off just leaving as soon as they find another job and forgoing the incentives.
An on point post by @9akg+1mbpAqTA.