The phrase "what has/will become of" is commonly used to inquire about the current or future status of something, often with a bit of uncertainty or concern. There are several synonyms that can be used to convey a similar meaning, depending on the specific context. For instance, "what lies ahead for" or "what fate awaits" could be used as alternative phrases. Other possibilities include "what will happen to," "what is the future of," or "what will be the outcome of." These synonyms all convey a sense of curiosity or worry about what might happen next in a given situation.