The new upper stage of the SpaceX Super Heavy Starship is called the Starship. Elon Musk has described that the Starship can make it to orbit in a single stage but it would not be able to have a heat shield, landing propellant or landing legs. It is single stage to orbit with virtually no payload or it is reusable.
It technically could, but wouldn’t have enough mass margin for a heat shield, landing propellant or legs, so not reusable
— Elon Musk (@elonmusk) May 18, 2019
SOURCES – Elon Musk Twitter, SpaceX
Written By Brian Wang, Nextbigfuture.com