What (or who) in the FF do you consider unresolved?

Name a person, place, “Thing”, or storyline that was just left dangling...

Here’s a few I can think of..

Aron the Watcher’s FF clones
Lazerfist (Suarez)
Goodfire, Lumen, Smash
Four Freedoms Plaza image (two buildings and FF statues)
Sharon Ventura
Kristoff Vernard
Alexander Flynn