I would like to claim the following, for fics (Lord help me):
The war is over, but his family's trust in him has been shattered. Lucius must change his entire life in order to win them back. Post Deathly Hallows. May be AU if required.
Lucius as a grandfather - does he chide Draco for not being strict enough, or does he spoil Scorpius behind Draco's back? (Or both?).
Narcissa makes peace with her sister Andromeda. The two get very drunk and so does Lucius. Sex occurs.
Lucius is bitten by a werewolf and then tortured by Voldemort. He escapes to the Order of the Phoenix for help and Remus is the one to show him how to deal with being a werewolf.