His return is not invisible or only as a cloud. He is the image of the invisible God.
Colossians 1
15 He is the image of the invisible God, the firstborn over all creation. 16 For by Him all things were created that are in heaven and that are on earth, visible and invisible, whether thrones or dominions or [
b]principalities or [
c]powers. All things were created through Him and for Him.
For Christ it is this way presented
Revelation 14:14
Then I looked, and behold, a white
cloud, and on the
cloud sat
One like the Son of Man, having on His head a golden crown, and in His hand a sharp sickle.
This is the invisible God, The Father in the cloud
Matthew 17:5
While he was still speaking, behold, a bright
cloud overshadowed them; and suddenly a voice came out of the
cloud, saying, “This is My beloved Son, in whom I am well pleased. Hear Him!”
Though even God the Father has a face.
But no flesh can see the face of God and live.
I assume flesh would be consumed
Exodus 33
17 So the Lord said to Moses, “I will also do this thing that you have spoken; for you have found grace in My sight, and I know you by name.”
18 And he said, “Please, show me Your glory.”
19 Then He said, “I will make all My goodness pass before you, and I will proclaim the name of the Lord before you. I will be gracious to whom I will be gracious, and I will have compassion on whom I will have compassion.” 20 But He said, “You cannot see My face; for no man shall see Me, and live.” 21 And the Lord said, “Here is a place by Me, and you shall stand on the rock. 22 So it shall be, while My glory passes by, that I will put you in the cleft of the rock, and will cover you with My hand while I pass by. 23 Then I will take away My hand, and you shall see My back; but My face shall not be seen.”