The successor to the space shuttle will be coming from a private company.
This is SpaceX.
The artist picture here below shows the space ship, named Dragon.
Moreover, to show to US government and to others that this ship is only a start, SpaceX has announced that they wanted to send man on Mars between 10 to 20 years.
This is only an annoucement for the moment, but we will see!
Artist picture of Dragon from SpaceX in orbit. Credit: SpaceX