OK, I kind of skipped over the rest of the posts because there was lots of repetition in the end, so if anyone already mentioned what I am about to say, sorry.
I think we should treat Wodins leaving the game as part of the game. It doesn't matter if the character in game or the character behind the screen decided to leave, things happen. Just integrate it into the story. Maybe he was called back to his plane for an emergency, maybe the opposing faction found a way to "unsummon" him, maybe whatever kept him on this plane was broken, I don't know.
Just take it and move on. Things change, the l