Anony Mous: It will be the same old drab talk. But now it will be given by the GB
Unlikely to be GB.
Most congregations will view a talk that has been prerecorded by the branch office, and in many cases, given by a member of the Branch Committee.
Since the speaker in the video recording will demonstrate how to develop an outline and effectively teach from it, each elder and ministerial servant who serves as a public speaker should carefully review the special talk outline, the Ministry School book, pages 52-55, and Reminders for Those Assigned Public Talks (S-141) before the talk is presented in the congregation.
See:
Letter September 18, 2017 TO ALL CONGREGATIONS Re: 2018 Memorial and Special Talk
https://www.reddit.com/r/exjw/comments/70w5sm/september_18_2017_to_all_congregations_re_2018/