Preheat oven to 350 degrees F. Coat a 3-qt. rectangular baking dish with cooking spray. In a medium bowl combine edamame, corn, and fajita seasoning. Stir in 1 1/2 cups of the cheese. Spoon about 1/3 cup of the mixture onto each tortilla; roll up. Place, seam sides down, in prepared dish.
In a medium bowl combine tomato sauce, tomatoes, and chili powder; pour over filled tortillas.
Bake, covered, 20 minutes. Bake, uncovered, 15 to 20 minutes more or until heated through, sprinkling with remaining 1/2 cup cheese the last 5 minutes. Top with cilantro and, if desired, additional chili powder.