Hogs Haven published an article in May that introduced the discussion of what is likely to happen to the salary cap in 2021 if there were to be a significant drop in revenue in 2020 as a result of the COVID-19 pandemic.
That article focused on the key provision of the 2020 CBA:
Cancelled Games. If one or more weeks of any NFL season are cancelled or AR [All Revenues] for any League Year substantially decreases, in either case due to a terrorist or military action, natural disaster, or similar event, the parties shall engage in good faith negotiations to adjust the provisions of this Agreement with respect to the projection of AR and the Salary Cap for the following League Year so that AR for the following League Year is projected in a fair manner consistent with the changed revenue projection caused by such action.