I would not go to the Magical Gatherings at Tony's for breakfast. It was not at all worth it, and everyone in my family agrees. You do not get a breakfast buffet - it is a plate served to you, and it was cold. No coffee refills, no server showing any attention to our family of 13, including 2 toddlers. It was way over priced and too crowded. Chef Mickey's is half the price, all you can eat and more character interaction.
One nice thing is that if you are registered as a Magical Gathering, you get a special CM who will help to arrange dining for your entire party.
Have a wonderful time!