New mystery

In another thread,I was told that the mystery cards randomly select a year each time a new league is formed. If true, the mystery leagues are updating automatically. Further updating would be welcome. But if the system is not updating the years each time, I would really like to know that.

Mystery cards are not updated every year. There are 5 years per player. At the start of each league one of the 5 is randomly chosen as the card for that league.

I would ask for ”All of the Above”. Add sets for the 50’s and 00’s AND update the 80’s set as well. If made to choose between the two sets, I would go with the 00’s for continuity.