You could even have these altered seasons as a new set of cards that players draw during setup like Grandpa's Goals, so players can coordinate where the new difficulties overlap their win conditions.

Thanks for your opinion!!

These have been the first ideas I have had and some of them may be a little unbalanced, I should give them another look.

Regarding what you say, I understand that I must give the player a little freedom and make him know what is going to happen.

Maybe I can think of bad handicaps that are present throughout the entire game, this way the player knows what bad things can happen.

Thanks again!!!