On Holidays, the regular weekly Torah reading is preempted by the special Holiday reading.
The Sukkot reading for Shabbat is Exodus 33:12 – 34:26. The reason is, because that passage mentions the three pilgrimage festivals, including Sukkot. (The same reading exactly is read on Shabbat of Passover.)
The Prophets reading is Ezekiel 38:18 – 39:16, the prophecy of Gog and Magog. Perhaps this is the year that this prophecy will be realized!