Returning to the OP’s postulation China already is. At least by this generally accepted definition:

” A superpower is a state with a dominant position in international relations and is characterised by its unparalleled ability to exert influence or project power on a global scale. This is done through the means of both military and economic strength, as well as diplomatic and soft power influence.”

Whether or not it retains that position is a different question and one which be answered in the next two or three decades.