The sale can't be made void. Too much has happened since then, millions of shares have been issued and bought and they would all need to be reimbursed. Employment contracts have been agreed and they would all need to be nullified, causing untold grievance to many many people through no fault of their own. Add to that there's no precedent as far as I can see of such a thing happening after so much water has gone under the bridge. If the company had just been taken over then maybe something could have been done, but that ship has sailed a long time ago.
It simply will not happen.
It simply will not happen.