Super Mario Galaxy 3DS is a sequel to
Super Mario Galaxy 2 in development for the upcoming
Nintendo 3DS. It is known to make uses of the console's 3D capabilities and will most likely implement the unrevealed features of the handheld.
Features
This game is going to feature all suits seen in the previous games, as well as old-school and brand-new ones. The game will also have Yoshi, which was introduced in SMG2.
There will be brand-new bosses, as variants of the bosses from the first game, such as a new version of Dino Piranha and Topmaniac (indicating that the Topmen will have a triumphant return.)
A hub world, which was exempt from SMG2 will be present, and it will be more like
Super Mario 64's and
Super Mario Sunshine's than Super Mario Galaxy's, as a response to the fan's requests. It will be a completely remodeled Comet Observatory.
Luigi seems to be coming back, but in a way more like
Super Mario 64 DS than SMG it self, and Wario is most likely to be present too.
Retro Levels
The award for getting all 120 stars is a Retro area. Each galaxy in this area, such as
1-1 Galaxy will reflect early Mario games and will be based after them, with similar bosses and everything.