I think I read that his estate wasn’t very large at all.
Whut? Wrote and co-wrote some of the biggest hits of all time...Needles & Pins...I Got You Babe...Baby Don’t Go...The Beat Goes On...
I do remember tabloid stories about everyone from Cher to a person claiming to be an illegitimate son filed lawsuits against his estate. I think the mess drug on for a while so likely various attorneys ended up with a chunk of what he left.