It's perhaps safe to say Fido is unlikely to turn back into Zeus, unless Fido happens to run into Asclepius who is known to have brought many back from the dead.
Even then, Asclepius may still be bearing a grudge for once having been struck dead by Zeus (though he was later resurrected by Zeus and given a place on Olympus). If Asclepius does indeed refuse Fido's request for power restoration, Zeus's qualifies as a true case of scoring an own goal.
Then again, seeing how Zeus's one-time hostility against Asclepius is such an embodiment of utter futility, many a Chinese may let his imagination run wild by hypothesizing that Asclepius has turned Fido into many humans, without Zeus's mighty powers but with all of his sins, and sent them to China to populate football teams there.