Prepare the rice according to package instructions. Once cooked, set aside and keep warm.
Cut the chicken into bite-sized pieces and season with chili powder, cumin, paprika, garlic powder, onion powder, salt, and pepper.
Heat olive oil in a large skillet over medium-high heat. Add the seasoned chicken and cook for 5-7 minutes, or until cooked through and golden brown. Remove the chicken from the skillet and set aside.
In the same skillet, add the sliced onions and bell peppers. Sauté for about 5 minutes, or until the vegetables are tender.
Return the cooked chicken to the skillet with the vegetables, stirring to combine. Cook for an additional 2-3 minutes until everything is heated through.
In serving bowls, layer the cooked rice, black beans, corn, and the chicken and vegetable mixture.
Top each bowl with shredded cheese, sliced avocado, and garnish with cilantro. Serve with lime wedges on the side for added flavor.