R' Dov Bar Leib has told us several times that it will start in Yemen: [see comments here]
The War between Edom and Persia will commence in Yemen. As the pasuk about the Final Shofar blast that welcomes the Messianic Era tells us: יד וַיהוָה עֲלֵיהֶם יֵרָאֶה, וְיָצָא כַבָּרָק חִצּוֹ; וַאדֹנָי יְהוִה בַּשּׁוֹפָר יִתְקָע, וְהָלַךְ בְּסַעֲרוֹת תֵּימָן. And the LORD shall be seen over them, and His arrow shall go forth as the lightning; and the Lord GOD will blow the shofar, and will go with stormwinds of Teiman (Yemen).
HaShem is hovering over us and sees us here in Israel in our pain, some of it "self-imposed" from the Erev Rav. He then shoots an arrow in the direction of where the final war to destroy the World of Lies is going to commence. And with the blast of the Shofar, He will direct the judgement on the nations of the world from Teiman.
Today, as I checked for Nibiru news, I was surprised to see this video from them about Yemen launching missiles at Saudi Arabia.