Ideas:

1. One stormy night, barry was thinking about the one night stand he had with a woman. unfortunatly he never knew she had a child. Few years later... the child is 5 or older like 17 and has been living on the streets. Will barry find out and take her in?

2.during crisis the monitor tells barry that his city and someone else needed him, so batwoman took his place for the universe to be reborn, now barry must figure out what the monitor meant while figuring out what to do now that he is back for good. Meanwhile a young girl either five or older is living on the streets and appartment in the glades alone but is visited sometimes by a friend of her mother. Will barry discover that the young girl is his child and what will happen when he discovers she has powers.