Hi Denise,
Yes, there is concession stand type food available inside the amphitheater: hot dogs, nachos, popcorn, fruit, ice cream and such, along with sodas, beer and wine. You can also select boxes with cheese, fruit and dessert. Because you usually need to find seats for
Fantasmic! as much as an hour before the show, it's nice to be able to snack or sip while you wait.
If you are looking for a wider selection of quick service foods before you go into the amphitheater, I suggest you check out Fairfax Fare, near the entrance to Fantasmic!, for pork sandwiches, chicken, ribs, salads and gourmet hot dogs.
Please let me know if I can answer any other planning questions for you. Enjoy the show! It's a great way to cap off a day at Hollywood Studios.
Wilma