A number of various belief systems refer to their deity returning at some point.

Really, a number do that? Outside of Xianity, which ones do? I thought most of them just have the deity to supernatural stuff, as opposed to "returning".

Is returning from the dead, heaven, Sto'Vo'Kor, the Divine Treasury, the Fates, whatever, even called extra-terrestrial? They just took a long vacation to see the sites, burn in hell, talk to a god, and rock their soul. When they do come back, well, the book will probably be too long; I'm gonna hold out for the motion picture.