short of it is the Antichrist == muslims Mahdi
We don’t have to accommodate the end time prophecy of a valid theology to that of an invalid theology.
The only significance that it retains in our framework is how it will inspire followers of that religion to act in troubled times. They will no doubt attempt to identify their end-time figures, but there is absolutely no reason for them to appear in sequence or even at all — our own end time story will determine the outcome, Mahdi or no mahdi.
Personally, I believe that we may have had the major end time prophecy fulfilled and Hitler as anti-christ, battle between Germany and Russia also pivotal, and the last seventy years possibly the allegory of the millennial kingdom, so that the final phase of the end time may lead directly to the heavenly kingdom and the eternal rule.
That may actually mean that no further “anti-christ” figure is necessary although certainly an eruption of demons from the abyss is well underway.