WWE Superstar Roman Reigns, for example, has been away from the company since WrestleMania due to his compromised immune system.
Reports like these could further delay his return, provided the information is confirmed by the WWE.
A big superstar being put into quarantine could drastically change planned storylines, and the general continued spread of COVID-19 could keep other big names at bay until further notice.
There’s also a question of how this could affect the WWE product on a more intimate level, as it is unknown who has and has not been affected by positive tests.