I do not think that Sears can just cancel the Common Shares without notification to the Common Shareholders.
The CEO and the Trustee of the Bankruptcy have a fiduciary duty to provide adequate information to Creditors and Shareholders and that would include any cancellation of Common Shares.
There is zero stated in one of the Bids by ESL - filed with the SEC and dated Dec 28, 2018 - about cancelling the Common Shares.
In fact, it states the Buyout Bid would benefit Creditors and Shareholders.
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