I wouldn't think this would have any chance of offering "packages" in the Disney context...
Not only are they a wholly independent operation...but they actually own the land...a Disney first.
Four seasons is a private company whose majority shareholders are some computer guy (bill gates) and some saud prince (al waleed...who was one of the partners in euro Disney) and there clientele is exclusively the ultra wealthy who demand real service...which the "grand Floridian" has no hope of providing.
So don't expect "magic your way" packages or charging limit restrictions on the rooms.