The COG, Chicago Congregation, went so far as to find out where segregation would be when Christ returns, apparently....
These were done by the Chicago Worldwide Church of God in 1965.
You will notice as the illustrations advance from tribal draped Blacks in the first picture to the Asians in kimono's in the second looking like they are wandering, to the emergence of chosen ones, always illustrated as whites, all going steadily forward in their Sabbath wear, to the first-class white people in their long gowns and tuxedo's heading off to the marriage supper with the Lamb in the last picture.
To see the charts more clearly check it out here.
ht: SHT for the charts