Chatting with Pfhor on RHL just now, debating a Top-Secret™ theory of his, I came across an interesting idea, the only evidence against it being the connections between Alric and Moagim.
See, what if Alric ISN'T the Great Hero? What if the cycle went normally, and the Great Hero - the unnamed Emperor of the Cath Bruig - died in 2431? But then, who is Alric? Just some avatara? No. Alric is the most powerfull archmage ever to live... the only one who could possibly break the cycle... ALRIC IS MAZZARIN REBORN!
A piece of supporting evidence of this: look at the picture in GURPS where it mentions "One Other". Who is that, and what is he doing? Hehehehe...