There does seem to be some sort of circulation over the Yucutan, to the west of the very deep convection which has emerged over water. Exactly what this is and to what extent it is directly related to Stan, I'm not sure, but it's there and could develop into something if the circulation remains intact until it emerges over water. Conditions aren't too favorable for intensification, considering that there is a deepening upper low sitting just to its north.

Considering that there is a very large disturbed area of weather, with some tropical and non-tropical development (depending on where you look), the predictability of this whole mess is going to be pretty low.

Edit: The system over the Yucutan is now classified as 93L