Everybody needs to come to terms with the fact that the feather is never coming back. Face it, it wouldn't work with modern track designs. According to NP's list everything from MKDS is back (I think) along with three new items: the Mega Mushroom, the Lightning Cloud (this one sounds pretty cool, it makes you faster but will shock you after a certain amount of time, you can transfer it to someone else by running your kart/bike into them), and the POW Block. The first and last of those weren't explained, but the POW Block's name suggests something along the lines of Lightning.