From a purely Scriptural viewpoint, (via the NWT) the final preaching work won't be done by an org! 😄
(Revelation
11:3)
"I
will cause my two
witnesses
to prophesy for 1,260 days dressed in sackcloth.”
(Revelation
14:6, 7) "And
I saw another angel flying in midheaven, and he
had everlasting good news to declare to those who dwell on the earth,
to every nation and
tribe and tongue and people.*
He
was saying in a loud voice: “Fear God and give him glory, because
the hour of judgment by him has arrived, so worship the One who made
the heaven and the earth and the sea and the springs of water.”
*
These nations, tribes, tongues & peoples aren't gonna be reached
by trollies!
(Revelation
5:9) ...and
with your blood you bought persons for God out of every
tribe and tongue and people and nation,
(Revelation
7:9) ...and,
look! a great crowd, which no man was able to number, out of all
nations and tribes and peoples and tongues...
(Revelation
10:11) “You must
prophesy again with regard to peoples
and nations and tongues. . .
(Revelation
11:9) And those of the
peoples and tribes and tongues and nations
. . .
(Revelation
13:7) ...and
authority was given it over every
tribe and people and tongue and nation.
(Revelation
14:6) And I saw
another angel flying in midheaven, and he had everlasting good news
to declare as glad tidings to those who dwell on the earth, and to
every nation and
tribe and tongue and people,
(Revelation
17:15) And he says to
me: “The waters that you saw, where the harlot is sitting, mean
peoples and crowds
and nations and tongues.