I doubt we'll hear from him ever again. Jyggalag can't actually predict the mortal world, he failed to predict the success of the Champion of the Isles. If he can't predict one mortal, anything that interacts with mortals will be unpredictable as well.
The uncertainty of Mundus actually prevents Jyggalag, the concept of perfect prediction, from existing for anything but the short period until the world goes out of sync with his predictions.
I could be wrong, but didn't Dyus state that the Library of Jyggalag contain tomes that predicted the actions of every god and mortal in the past, present and future? I remember something like "the rise of Tiber Septim, the Numidium" etc.
Is it that Jyggalag cannot predict mortals in general, or is it that the existence of THAT mortal that keeps the Prince of Order at bay, and by "THAT" I mean the mortal contains the spark of PC-ness.
I recall that "an immortal hero, warrior, sorceror, and king variously known as Pelinal Whitestrake, Harrald Hairy Breeks, Ysmir, Hans the Fox, etc., wanders Tamriel, gathering armies, conquering lands, ruling, then abandoning his kingdoms to wander again." (http://www.imperial-library.info/history/merethic.shtml) Aren't those people just aspects of Lorkhan, individuals that house his Spirit/Ghost?
I even believe that Harrald Hairy Breeks is the same person as "King Harald" of Skyrim, mainly because King Harald died at the age of 108 (http://www.imperial-library.info/pge/skyrim.shtml) Tiber Septim, another aspect of Lorkhan as "Talos", also lived to be 108.
So long as Lorkhan's heartless spirit "impregnates" NIRN with free will, therefore giving birth to the concept of "madness" as Sheogorath, Jyggalag will always be unable to fulfill precised predictions....at least to that individual.
But why, then, did Dyus specifically refer to Tiber Septim as one of the beings predicted if the above is true? That, my friends, is because Talos cannot be predicted, and I only mentioned Tiber Septim.
___The Word Merchant of Julianos