I once idly speculated that Picard was the King of the Borg briefly. Was Seven of Nine the Princess of Borg?
Voyager added a lot of backstory through Seven. Her parents Magnus and Erin Hansen are the first from the Federation to study them and coin their name. Magnus is absorbed into the Collective, and the Queen keeps him around for 20 years just so she can surprise Seven with him. We don't know for certain what happened to Erin.
If Seven is the Princess, is Janeway the brave knight on a white horse come to rescue her?