It turns out that during Nintendo’s most recent financial briefing president Satoru Iwata made a rather interesting announcement. According to Iwata there is a new side-scrolling Mario game in the works for the 3DS! It will be released sometime within the next fiscal year which will be between April 1, 2012 and March 31, 2012. His exact quote was;
Although there is no logo here, we are planning to release a totally new side-scrolling action Super Mario in 2D as a key title for the Nintendo 3DS in the next fiscal year.
Unfortunately, no further information about this title was revealed during the briefing. But we will be sure to update you as any information is made available to us. If you’re curious you can read the details for the briefing here.
Source: Anime News Network