Sonic: Lost World will receive two pieces of downloadable content on Wii U, Nintendo President Satoru Iwata announced during today's Nintendo Directlivestream. The DLC stages will be based on Nintendo properties, the first being a level pulling inspiration and elements from Yoshi's New Island, Nintendo's 3DS entry in the series due out in spring 2014.
Called Yoshi's Island Zone, the first piece of DLC is available now for free, and has Sonic "speeding through areas filled with pipes, coins, Shy Guys and Piranha Plants." A brief look at the level can be found in the archived Nintendo Direct presentation.