I found this yesterday

https://www.todorock.com/curiosidade...isco-en-paris/

The article is in spanish, a brief summary could be:

""According to the italian web Maiden Concerts the band, their wifes and producer Kevin Shirley were together in Paris, where their recorded in Guillaume studios Breve new world and The book of souls. On the other hand Shyrley shared studio photographs announcing that he´s finishing a great project"

Just a rumour? Hope not..