Super Mario Fantasy

Creative process.
Universe where Mario marries princess peach, and king bowser is sent to a space prison in which he manages to dominate the entire system and forgets about the mushroom planet, this is how "emperor bowser" begins his conquest of the universe...
Mario and Peach lead a very quiet life in the mushroom kingdom, while Luigi learns the mystical arts of the stars, this is how a mystical entity contacts him to ask for his help and defeat the Koopa emperor.