There are several synonyms for the phrase "comes out in the open". One might use the phrase "reveals" as an alternative, as it carries a similar connotation of bringing something to light. Alternatively, one could use the phrase "discloses" to convey the act of sharing information that was previously hidden. Another possible synonym is "exposes", which emphasizes the act of revealing something that was meant to be kept secret. In each case, the implication is that something that was once hidden or unknown is now being brought to the forefront of attention.