User blog comment:Omega natsu2/Chapter 367: Jellal vs. Oración Seis, Predictions./@comment-3075024-20140115190901/@comment-7418318-20140115220730

Reaper Death Seal... I wonder if that's where Sarutobi will come in.

But considering that even Orochimaru was able to partially negate that, I doubt that Madara will succumb to it, even with Sarutobi now no longer suffering from the decline of old age. But it might be enough to weaken Madara sufficiently for others to take him down.