i removed some of your post in this quote to keep the discussion to the point, and the stuff that i do not wish to talk about at this moment, though, what you brought up also raise lots of questions but at this moment im not interested.
Let me give you an example if i may.. if i were to tell you that Zaid will marry two women “BEFORE” he dies. Now, this means he will be marrying two women before dying but that doesnt necessarily mean that the moment he marries the second woman, he will suddenly die right away. Same is the case when it is told that Jesus (AS)'s arrival will be in the end days, however, this only means that qayamat will not happen UNLESS Jesus AS has arrived. Once he(AS) is there, now qayamat can happen today, tomorrow , 100 years from now or even 1000 years… It is not to be taken as the moment he arives, thats the end of the world. Hope that make sense.
Regarding Him being the umati of Hazoor SAW, well, you then admit that Hazrat Jesus (AS) will be the last prophet to be lived ? Now, whether he will be an ummati or not ummati or whether he AS came before Muhammad PBUH ..is out of the question here. The fact that He (AS) will be the last prophet to be sent (again…somehow) to mankind would make Him the khataman nabiyeen, if it means literally to be the last.
Are you saying His (AS)'s nabuwat will be taken away from him ? because on one hand you’re saying Muhammad PBUH is the last in every literal meaning and that NO new OR previous prophet can come after Holy Prophet PBUH ?