I'm curious as to how you visualize the angels being cast down to earth. Will they show up in a physical body? Will it be immortal? Will they appear and disappear in a supernatural way? Or will they maybe have to possess someone?
Do you know your Bible? What does your Bible show you about angels appearing on earth? See the Genesis 18 and 19 examples. Three men appeared at Abraham's tent door, and one of them was Lord Jesus before... He was born through woman's womb. What does Hebrews 13:2 say?
Angels don't need a flesh body to appear here on earth in our 'earthly' dimension, nor in order to live upon this earth.
But a lot of pastors believe angels put on a flesh body to appear on earth, but just the opposite idea is written in The Bible, like that Hebrews 13:2 verse. Many also wrongly believe that the image of 'man' began with flesh, when it actually originated from our Heavenly Father's Own Image Likeness, per Genesis 1:26-27.
Many also wrongly believe that the pit of hell, Satan's abode, is inside the earth, literally. The Biblical evidence is that Satan's realm and abode is in the 'heavenly' dimension. Only when that war in Heaven of Rev.12:7 forward happens will Satan with his angels be cast out of the heavenly dimension, and instead into our earthly dimension, in plain sight.
The parable God gave about Satan in Ezekiel 28 using the
"king of Tyrus" as a type for Satan, reveals that Satan will be destroyed by being
turned to ashes upon the earth in sight of all those who see him. That suggests here on earth in our 'earthly' dimension is where he will be destroyed, in plain sight.
How can all this be? some might ask. Why would Satan want to appear on earth in sight of men?
It's because of what Satan did in the 'old world', having coveted God's Throne. That is how he originally fell. Satan still wants to be GOD, and worshiped as GOD, and that is what he is coming to try to do, again. He cannot try to pull that off by hiding in the heavenly dimension, or just by possessing someone. The world has to see him as GOD on earth, like Apostle Paul showed in 2 Thessalonians 2:3-4.