Preheat the oven to 375°F and prepare a 15x10-inch baking pan with a greased rack.
Crush corn bread croutons into fine crumbs and combine with 1/2 cup picante sauce and 1 tablespoon orange juice concentrate. Let stand for 10 minutes.
Stir in 2 tablespoons chopped cilantro, beaten egg, and salt.
Crumble ground chicken and fresh chorizo into the crouton mixture and mix lightly but thoroughly.
With wet hands, shape the mixture into 1-inch meatballs and place them on the greased rack in the baking pan.
Bake meatballs until an internal thermometer reads 165°F, about 15 to 20 minutes.
Meanwhile, in a small saucepan over medium heat, combine orange marmalade, jalapeno pepper jelly, remaining 3/4 cup picante sauce, and remaining 4 tablespoons orange juice concentrate.
Bring the sauce to a boil, then reduce heat and simmer for 5 minutes.
Stir in chopped mango, 1 tablespoon chopped cilantro, and 1/3 cup pomegranate seeds if desired.
Pour the sauce over the baked meatballs and garnish with remaining cilantro and pomegranate seeds if desired before serving.