Rutherford wrote about the Elijah class and the Elisha class which took over in 1928 from the early anointed. So this is not a new idea because remember the WTS taught that the anointed would go to heaven in 1914.
Addition: the Elisha class took over in 1919 and was given a "double portion" of what Elijah received.
Blondie - I'm a bit confused. I remember the "Let Your Name Be Sanctified" had the Elisha class taking over in 1942 when Rutherford died.