In a large soup pot, over med-high heat, add petite diced tomatoes, green chiles, poblano peppers, onion, and salsa. Bring to a boil, then reduce to a simmer for 10 minutes.
Add cumin, chili powder, and garlic powder. Stir to combine. Add cut-up chicken, black beans, frozen corn, diced potatoes, and chicken broth. Bring to a boil then reduce to a simmer. Simmer for 20 minutes.
Taste to see if you want additional seasonings or if you want more heat. You can add 1 can Rotel Original to make soup hotter or add 2 jalapenos that have been seeded and diced. Simmer for 10 minutes.
Stir in sour cream and mix gently but well. Simmer 5-10 minutes.
Garnish: Top soup with tortilla strips or a dollop of sour cream or some diced ripe avocado.