I wouldn't panic too much.
"Retirement" is the oldest marketting ploy in the Japanese celebrity playbook. Miyazaki Hayao has "retired" three times in 12 years (making at least two "last films").
^o^ hahaha~! that may be true, but it's still sad to think about!
^_^ i remember like 5 years ago someone told me he was dead! no THAT'S rediculous!
but i figure, he's done so many great things that he can retire however many times he wants! he certainly changed my childhood!