came across an interesting scenario yesterday. A flying creature dragged a player into the nearest gate, the Abyss. On the same phase, another player left The Abyss back to Arkham, over the gate.
He intended to close, and seal. But we didnt know what happens to the other player still in the Abyss. No other gates that lead to the Abyss were in Arkham.
We ruled he would go to Lost in Time and Space. But we'd like a more official answer.