The book Man’s Salvation Out of World Distress at Hand! alluded to elders being appointed as princes. Page 362
27 As the “new earth,” human society organized under the “new heavens” kingdom, gets under way, there will be need for overseers, superintendents, supervisors of communities and operations. Elders who survive the “great tribulation” and form part of the “new earth” will have gained much experience by their services rendered now in the congregations of Jehovah’s Christian witnesses. The “great tribulation” will not have discharged or dismissed them from the theocratic position of elders and overseers among the members of the congregations that survive with them into God’s righteous New Order. They can carry right on in this capacity, if the will of the heavenly King Jesus Christ is in favor of that.
28 At any rate, the experienced elders and overseers will be available for the Messianic King to appoint as “princes in all the earth,” from the very start of his thousand-year reign onward. What a privilege that will be for them to be the visible princely representatives on earth of the millennial Kingdom!