I don't disagree with the majority of the OP's assumptions, save for a few details along the way

anything having to do with the ideology of reincarnation is off the table in my mind however as God has made it perfectly clear that each soul is appointed to die but ONCE

those he sends forth in these latter days who will be of and from His Election from the first earth Age

will be newcomers into the fleshly estate, held back by predestination to be born into this final generation that all prophecy may unfold with and through those parts these are foreordained to fulfill herein...

David was David and not another, just as Christ is Christ

those who come forth will be representatives and/or TYPES of the forerunners of such...

period