1) WT teaches that Jesus became king in 33 C.E. over the Christian congregation and
Matt 28:18 And Jesus approached and spoke to them, saying: “All authority has been given me in heaven and on the earth. 19 Go therefore and make disciples of people of all the nations, baptizing them in the name of the Father and of the Son and of the holy spirit. NWT
2) then in a new way in 1914 over a cleansed heaven (1878 old light).
Jesus was granted still more authority in 1914. In that year he was appointed as King of Jehovah’s Messianic Kingdom.” WT Library 2009, All Publications, Books, “My Followers” (cf) 2007, chap. 18 p.185, para. 8
3,4) Maybe there is 3rd way, over a cleansed earth after Armageddon; and then completely at the end of the 1,000 year reign with the final destruction of Satan, the demons, and the rebels on earth.
Lots of wiggle room for the WTS