Well, I acknowledge these forums are surely more based on factual rather than speculative, but this is a piece of news I happen to hear while watching a friar, who had spent part of his life in the same monastery alongside
Saint Pio of Pietrelcina, interviewed on the state-run RAI2 tv channel,
and I'm reporting it just as curious news, although with all due respect.
When alive Father Pio was renowned for being a performer of miracles and a prophet. Lots of member of the Savoia family, including the Duke of Savoia-Aosta and his first wife have been said to be devotees of Father Pio, and wanted their son Aimone, the duke of Apulia, to be christened by the Saint himself. BTW Father Pio spent the greater part of his life in a monastery located in San Giovanni Rotondo, a small mountain town in Apulia.
While christening the little Prince, Father Pio predicted Aimone will become the next King of Italy! Besides inside the crypt containing Saint Pio's mortal remains, there is a bas-relief that depicts Prince Aimone holding the Collar of the Most Holy Annunciation, that is the insigna of the King of Italy.
Apparently in a letter sent to Queen Maria José, Saint Pio wrote: " A relative of Yours, will be the next King of Italy" ( he mentioned a relative , not a descendant of hers). This is what they said in the interview,
but again, take it with a grain of salt.
Here's the picture of the bas-relief taken from the crocereale website. Aimone is the kid standing behind the Virgin Mary:
http://www.crocereale.org/images/stories/bassorilievo3.jpg