You might be able to if you do what we did last October after our dinner at Kona.
Check in at Kona earlier than your ADR time. You might get seated earlier. After dinner, we did manage to get to the Magic Kingdom about 15 - 20 minutes before the parade. We went through the left tunnel under the train station, headed up toward the City Hall and public restroom area. The curb to the right didn't have that many people. The parade starts from there, so it will finish in that section first.
After the parade, just follow the crowds that enter Main Street to view the fireworks, and you'll be fine. Because I was travelling with my mom and her friend, they wanted a place to sit. So I weaved towards the Plaza Pavilion area and found seats there. It wasn't easy because there were quite a few others with that idea, but it was ok. I don't recommend sitting there if you haven't seen Wishes before.
The best place to view Wishes is front and center on Main Street, with the clear view of the castle in front of you. If you do miss the parade, you still have a good shot at a fireworks view on Main Street.