Sure.
#1. INSOLVENCY. In insolvency, common shares get the LEAST and rank LAST among all stakeholders. In law such parties are called the "remainder men" because they get the scraps as after other stakeholders get theirs.
2. MERGER LAWS/"White Out". No, I never heard of any conveyance in a re-org where preferred shares were wiped out and common shares survived at all. Please provide an example.
3. INACTIVE CONTRACTS. Yes, I have heard of rare situations where contracts cannot be fulfilled due to extenuating factors (like war). But, no, I have never heard of one case where this concept was applied fo void preferred stockholder's rights. Thanks in advance for providing an example where this was successfully invoked to void the rights of $18 billion worth of preferred stock.