Re: Hazrat Isa A.S.
indeed, it is agreed among major school of thoughts (all four imam) ,(sunni and shia) that hazrat Issa will come back as the follower of Prophet Muhammad (pbuh) and Imam Mehdi will lead the ummah.
All authentic books of hadith confirmed it. As bro. Psyah also mentioned the hadith about the grave of Issa will be next to Prophet Muhammad(pbuh).