Once the vegetables are cooked through, crank the heat to high and stir frequently for 1 minute. Add the stock, scraping up any brown bits on the bottom of the pot. Reduce heat to a simmer and cook for 10-15 minutes. Add the chipotle sauce, green chilis, beans, tomatoes, chicken and chorizo, and a dash of cayenne powder if desired. Cook for 20 minutes to allow the flavors to meld. Taste and season with salt and pepper as necessary.