Future Mario Games will have Downloadable Stages

[JEMC]

RolStoppable said:
Why don't they just make a full new game instead? That would give Nintendo's hardware more exposure to the public than downloadable stages that most people don't know about. Selling more hardware means selling more software means more profits for Nintendo.

Because that could harm them in the long term. You have seen here (and in many other places) how people complain "another Mario game". If they launch many Mario games of the same genre, in this case platforming, in the same console that could cause fatigue among the buyers and mean lower sales for future Super Mario games.

By launching only 2 Super Mario games during the console's lifespan but with DLC, they can avoid that danger while increasing their income. After all they won't force you to buy it, it's your option.