Jesus (a) will be a judge and ruler under Imam Mahdi (a) at the end times as the many hadiths show.
Jesus is not going to come back to this earth to do anything as the NT scriptures show.
John 14:19 Yet a little while, and
the world seeth me no more; but ye see me: because I live, ye shall live also.
John 16:10 Of righteousness, because
I go to my Father, and ye see me no more.
John 17:4 I have glorified thee on the earth:
I have finished the work which thou gavest me to do.
John 17:11
And now I am no more in the world, but these are in the world, and I come to thee. Holy Father, keep through thine own name those whom thou hast given me, that they may be one, as we are.
Jesus never claimed to be a king, and Jesus never said He was coming back to earth to judge and rule.
John 18:36 Jesus answered,
My kingdom is not of this world: if my kingdom were of this world, then would my servants fight, that I should not be delivered to the Jews: but now is my kingdom not from hence.
John 18:37 Pilate therefore said unto him, Art thou a king then?
Jesus answered, Thou sayest that I am a king. To this end was I born, and for this cause came I into the world, that I should bear witness unto the truth. Every one that is of the truth heareth my voice.
These two verses in John 18 completely negate that Jesus is the King of this world or that Jesus will ever come to this world to rule it, and they fit perfectly together with John 17:4 and John 17:11. Jesus came into this world to bear witness unto the truth about God. He did that so there is no more reason for Jesus to come back to this world again. That is why Jesus said “I am no more in the world.”