[change format one year later]

If I wanted to change the format of the premier, but not immediately from the first year, if I wanted the next year to go from 20 to 18 teams, how could I do? Can I create the copy of the competition, but then to make it start at the right time and make it take the teams from the previous season how can it be done?

[Online game]

I would like there to be the possibility to stop the game according to pre-established times (once a day, once every 6 hours, once every two days). Now it happens in numerous online games that the game progresses even 15 minutes at a time.
It would be much faster if you could choose to stop the game every 6 hours and respond together at the same time to red news etc.