Asalamu 3alykum
Welcome to the forum
I briefly went over your site and realized you have adopted the fallacy of the traditionalists storey/narrative of the Mahdi.
This narrative has no support from the Book of God when it is understood correctly especially when it comes to understanding the term "prophet" and "messenger".
It seems that you have believed that there will only be one messenger/rasul after the prophet Muhammad(pbuh).
This is not warranted from the Quran, as a matter of fact the Quran supports that messengers will continue to come as God wills, to warn or confirm the truth which we possess.
There could of been many that have walked the earth from the time of prophet Muhammad till present day that have warned and confirmed the truth to their respective nations. As you seem to understand that to every nation there is a messenger and to every nation a messenger will speak to his people in their language. This does not mean that one final messenger will come and his name is the Mahdi(Matheism) to the whole world.
This has nothing to do with a final messenger named Mahdi which is alien to the Quran.
Also keep in mind that a belief in such a final saviour to come as a prophecy is unwarranted as this will contradict the message of the Quran as it teaches that believers should believe in the imminent hour to come suddenly without warning.
Hopes that helps Insha'Allah
Salam
END OF PROPHETHOOD - CONTINUATION OF MESSENGERS?
http://quransmessage.com/articles/end%20of%20prophethood%20FM3.htmTHE UNWARRANTED INFATUATION WITH SEEKING KNOWLEDGE OF THE FINAL HOUR
https://www.facebook.com/joseph.a.islam/posts/494897590647373