Kaze
Banned
I would expect Turkey to enter the War as an allay. They would be forced to do so - so entrance to the black sea through there is impossible.
The other, other option that has yet to be discussed would be the unreliable ally of Romania. Romania did have a navy (a non-significant navy) , but a way in if you attack through there... But, Romania is not a trusted Allay to the Axis - hell, if you go by one historian's analysis of the country - they declared war on both sides and still lost, lost so badly that the leader of Romania was taken to a firing squad and when they missed him, he got up and began dressing the squad down for not shooting him properly, and the squad proceeded to beat him to death with the buts of their rifles.
The other, other option that has yet to be discussed would be the unreliable ally of Romania. Romania did have a navy (a non-significant navy) , but a way in if you attack through there... But, Romania is not a trusted Allay to the Axis - hell, if you go by one historian's analysis of the country - they declared war on both sides and still lost, lost so badly that the leader of Romania was taken to a firing squad and when they missed him, he got up and began dressing the squad down for not shooting him properly, and the squad proceeded to beat him to death with the buts of their rifles.