I'm fairly certain that these have not been simulated yet, but I thought it would be neat to see in the future.
Simulation of the light gun used for lost communications procedures.
Emergency vehicles that move around and accurately treat your aircraft depending on the type of emergency declared.
Military interceptions for certain airspace incursions.
Runway incursions from animals.
If anyone knows of any features like this in development or already out there, let me know!