Pretty sure Metzen has said he's more comfortable being out of the spotlight and just does voice overs to help out/for fun. I really doubt the guy is hurting for money.
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I don't believe so, if I remember correctly the Phylactery wasn't present at all when we killed him in WotLK (unlike the Vanilla version where we handed it to Father Inigo Montoy, who apparently later took it to Northrend to resurrect him).