Interestingly enough, the new Super Mario game, New Super Mario Bros. 2 will be a cash grab in more ways than one because Nintendo is planning on releasing some paid DLC after the game is released. The DLC will be additional coin rush stages and the company is planning on taking user input into account when they design the game.
This is a new turn for Super Mario and Nintendo as a whole as they have never offered DLC for any game in the past. It will be interesting to see how much these DLC stages will cost, but we will have to wait awhile to see for ourselves.