Prophet ^Isa, peace be upon him, is still alive–in the second sky–worshipping Allah. He will descend to earth before the Day of Judgment and his descent will be one of the great signs of the nearing of that Day.
Prophet Muhammad informed us ^Isa will descend to earth at a place on the eastern side of Damascus, with his hands on the wings of two angels. He will meet a group of Muslims getting ready to perform the Prayer, with the Mahdiyy as their Imam. The Mahdiyy will ask Prophet ^Isa to lead them in that prayer, however, ^Isa will ask the Mahdiyy to stand imam for them–as a sign that Prophet ^Isa will rule with the rules revealed to Prophet Muhammad. After this one time, ^Isa will lead the people in prayers because he has a higher status than the Mahdiyy.
After he descends, Prophet ^Isa will rule the earth with the Shari^ah (Islamic Laws) of Prophet Muhammad, the Shari^ah Muslims are ordered to follow until the Judgment Day. He will break the cross, kill the pig, and abolish the jizyah (compulsory payment by the People of the Book to the Muslim state), because in the rules of Prophet Muhammad the jizyah is only applicable until the descent of ^Isa. He will kill the Dajjal, an ugly, evil blasphemer who claims himself as God, and who misleads many people to blaspheme.
Prophet ^Isa will perform Hajj and travel to visit the grave of the Prophet to salute him, and to greet him by saying, “As-salamu ^alaykum ya rasul Allah”, as narrated by Abu Dawud at-Tayalisiyy and others.