In a large pot, heat broth until boiling. Reduce heat and add in cubed cream cheese and Velveeta cheese. Stir until melted, being careful to keep heat low enough to not scorch to cheese.
Once the cheeses have melted, add Ro*Tel (liquid and all), cream of chicken, garlic powder, onion powder, and salt. Stir to combine.
Once heated through, add cooked shredded chicken and corn. Return to gentle boil and allow corn to cook through for at least 5 minutes.