Nintendo’s Masahiro Sakurai, who is overseeing Super Smash Bros. Wii U, briefly touches upon his idea of what DLC should be.
New Super Mario Bros. U has been a great success for Nintendo, not just in terms of sales but also in terms of how much downloadable content has been purchased, judging by early figures from Japan alone. Nintendo EAD designed Mario’s DLC in the form of an add-on chapter that provides various optional benefits with the side-story.
Why then, was Super Smash Bros. Wii U not a part of the DLC plans for New Super Mario Bros. U? It would’ve made sense—both New Super Mario Bros. U and Super Smash Bros. Wii U are Nintendo Wii U games, after all.
Nintendo’s Masahiro Sakurai-senpai, who is overseeing Super Smash Bros. Wii U, tells a magazine that we’ve never actually read before that it’s because Nintendo felt that DLC should be based on the game it’s being included in, and provide more content for existing fans, instead of disappointing them with something different.
Sakurai-kun added that, if you intend to do a collaboration like Super Smash Bros. Wii U, which is intended for a different audience, it’s best to keep it separate from the main game.
As previously mentioned, Sakurai-chan hinted that Super Smash Bros. Wii U will take place at least partly in the modern world, so it makes sense that the game isn’t aimed at the exact same audience that enjoys traditional Super Bros. of Mario games.