The Great Unknown

From ''The Lemony Snicket Wiki''

For obvious reasons, not much is known about the mysterious question mark shaped object, which is referred to as the Great Unknown in The End by Kit Snicket, who says that her deceased brother, Jacques Snicket, was the very first to refer to it as such. It is larger than both the submarines Carmelita and Queequeg. Captain Widdershins has been quoted saying that the question mark "was something even worse than Olaf himself". There is still no proof, or even a hint, at what could be lying underneath the waters where the question mark roams. Kit Snicket, who was on the Queequeg at the time that it was first being approached by the question mark, recounts that the crew of the submarine decided to take their chances with it, which voids the Captain's words and makes it unclear as to whether or not the the Great Unknown is actually good or bad.