I don't know if you know this but Kona Cafe is nowhere near Epcot, it is in the Poly which is right by the MK. If you are looking for a sit down breakfast restaurant that is not a character meal, you may want to try the Captain's Grill at the Yacht Club, I believe they open either at 7 or 7:30am and then you can walk over to Epcot. Another option would be Kouzzina's, but I am not sure what time they open in the morning. We haven't been to either of these restaurants, yet, we do have ADRs to both for breakfast for our May trip. The only breakfast option you have inside Epcot is Princess Storybook Dining at Akershus in Norway which is a character meal, but their earliest seating is at 8am. Hope this helps you out.