There are two places mentioned Christ’s return and I’m not sure how these occur in terms of timing or sequence:
1) Zech 14:4 at mount of Olives
2) Rev 19:13 at Bozrah (also cited at Is. 63:1-4).
I might think that God will have the battle at Bozrah (Jordan) first, then land His feet on the mount of Olives since Zechariah mentioned about God battling with the people at 14:3.
I am in agreement with you that the Lord will appear at Bozrah (Petra) first, to save the embattled Jewish remnant (Isaiah 63:1-6). But I think the order will go more like this. After Bozrah He will appear in the sky over Jerusalem (Matt. 24:30, Rev. 19:11-16) before touching down on the Mt. of Olives (Zech 14:4) to complete the defeat of His enemies and take possession of planet Earth for good.