He died and his terrestrial body was turned into a celestial body...He went to heaven...I don't think I would say he disappeared...
And this has been dealt with in the past. Please consider that herein lies the necessity of understanding what exactly was (and still is) at stake with the Seven Ecumenical Councils.
Those councils that accuse non Catholics of being anathema...Those councils where they couldn't get unanimous consent (or any thing close to it) on anything...
As a born again Christian, I have no interest in Catholic councils...
Amen.