This is the sixth of the seven Haftarot of Consolation, the Sheva d’eNechemta, from Yeshayahu. This stage is a time of such overwhelming connection to G-d that Chazal refer to it as “Olam Haba”, The World to Come. It is also the first time that building the Temple is mentioned.
Linear annotated translation of the Haftarah of Ki Tavo
The combination of the Haftarah and the Parsha shows us something about the World to Come that we probably would have overlooked otherwise: A Portion in the World to Come