The phrase "what's coming one" can be used to refer to a variety of things, including future events, upcoming trends, or even a person's destiny. Synonyms for this phrase might include terms like "what lies ahead," "what's on the horizon," or "what's in store." Other options could include "future prospects," "upcoming possibilities," or "what's next." Depending on the context in which the phrase is being used, additional synonyms might include terms like "prognostication," "prediction," or "forecast." Regardless of the specific phrasing, the key concept behind this phrase is one of anticipating something that is still unknown or uncertain.