Well, given my tardiness regarding poetry I thought I could maybe do penance here

.
I'll take my suggestion from the Tom Petty and Jeff Lynne song
Free Fallin' and suggest
Free Falling as a topic.
It could be:
A fall into or out of a relationship.
A fall into personal despair (economic, depression,...).
A novel (or maybe non-fiction) framed within a stock market, business or economic crash.
Science fiction with an anti-gravity thread

.
A novel involving sky-divers.
A free falling journey.
etc.
Also a few clues in this video (but only if one likes Tom Petty and are not fussed by the freedoms of rock video).
https://www.youtube.com/watch?v=1lWJXDG2i0A