After the plan is executed, the shares may be cancelled, or the shell can emerge as a "shell play." It would depend on who can pay a lawyer to clarify it with the court, and who goes into court after the creditors have been given the money they are getting from "the plan." Nothing is written in stone until either the court dissolves the company, or other actions stop it from trading. The fact that the company is in Chapter 11, and has not filed a Chapter 7 almost assumes that "the plan" is intended to reorganize, not liquidate the entity. It gets tricky though. Though not specifically declared as "cancelled," they often just dry up and blow away.
I might have to look over the whole plan, but the synopsis was pretty clear that any shell emerging from the Chapter 11 would hold no property assets.