Don't get your hopes up. Disney staff will try to make it happen, but it is often hit or miss getting even two rooms together. You are in CL which means three adjoining rooms have to be vacated on the same day in a very small number of rooms. In Poly CL there is only the Hawaii building which obviously reduces your chances. You can ask, but I would be pleasantly surprised if I received this request, and not disappointed if I did not.
We always make our requests at the time of booking and then check to see if we have our requests met upon checkin. It wouldn't hurt to contact IPO about a week or so before arrival and see if they can help. They don't assign rooms, or at least I don't think that they do based upon calling with a room request to the YC IPO. (They transferred my call to the room assigners.) Room assigners will select your rooms some time prior to your arrival, probably around 5-7 days in advance.
Good Luck!