The Adventists developed this belief (before the Civil War) and C.T. Russell & Nelson Barbour adopted the doctrine when they began publishing the Watchtower (1880's).
When we studied with or were raised in "the truth", we weren't told about the origins of this belief. Most JW's have no idea about the shaky scriptural underpinning - and Jesus never said "hey, when I become King I'm going to turn the earth back into a paradise". Most JW's think of the paradise hope as a Watchtower exclusive....
This carrot hope (that includes resurrected parents, grandparents, kids, etc.) is the primary reason questioning JW's remain in "the truth".