I'm a heavy believer on the whole Imu is a child theory.

We've not had a child villain before, it would be fitting in a series all about dreams, imagination, manifesting, adventure, freedom and all that.
Instead of a generic tyrannical adult villain who must be stopped once and for all either by sealing or being killed or offing themselves somehow, this poses a uniquely morally difficult scenario and a necessary alternative method of "defeating" the grand oppressor.
Plus since a children's animated series inspired One Piece (Vicky the Viking) it fits too and also fits more if we get Imu truly revealed in a viking themed arc....

Funnily enough, Vicki has orange hair and for MANY years I expected Elbaf is where we will learn far more about Nami somehow....even though she's from Oykot, or well was found there at least. It might be a sort of Zoro and Wano situation again or something?
Also her father has red hair and an eyepatch, hmm....

The eye patch pirate is probably the man marked by flames or Xebec (in a flashback most likely once hes fully revealed finally) but who knows what could happen....