Spawn of Khyber/LEB Judge
Tondrek is in this one, so that'd be a bit of a conflict of interest. Maybe THB, but he's been busy too.
Well, I don't seem to understand the difference between ending the adventure early because the DM disappears, and ending the adventure early because the DM decides that he spread himself too thin. From the perspective of the players, the adventure is ending early (and to protect the player's interest in this, the reason for the judge steps in rule).