Seeing as he's free to knock about in the Waters of Oblivion again, it's safe to assume that at some point he'll have a tangible presence in the Aurbis once again, right? Granted, he's somewhat of a minimalist, but every Daedric Prince has their followers. I'm sure there's a cult of nihilists somewhere (probably Alinor) that love the idea of Order devouring the chaos of reality.
And while I'm on the topic of Jyggalag (who has the best name), are there any other Daedra Lords hiding in obscurity? We already know that Daedric Princes can be sort of created (Malacath) and twisted/remade (Jyg/Sheo) So is it possible that there are others we either haven't seen or could be created?