I think it's better that the story not be told. Not every gap needs to be filled. There's always room for mystery, especially for characters who are so unique.
Kim: I'm detecting some weird technobabble.
Janeway: A possibly dangerous anomaly that we know nothing about?
Kim: Yeah. I suppose we should steer clear.
Janeway: Ha! Good one, Ensign. Take us in, Mr. Paris.