Prepare cornbread batter according to package directions. Spread half the batter into a greased 8-in. square baking dish; set aside. , In a large skillet, saute the green pepper, onion and celery in oil until crisp-tender. Stir in hot dogs; saute until lightly browned, 3-4 minutes longer. Stir in the chili, brown sugar, garlic powder and chili powder; heat through. Stir in 3/4 cup cheese. , Spoon over cornbread batter; top with remaining cornbread batter. Sprinkle remaining cheese over the top., Bake, uncovered, at 350° until a toothpick inserted in the center comes out clean, 28-32 minutes. Let stand for 5 minutes before serving.