Season the pork and brisket with 1 teaspoons salt and 1/4 teaspoons pepper each. Combine the black beans and their liquid, the tomatoes, bell pepper, red onion, chipotles and adobo sauce, the chili powder, cumin, oregano and 1 teaspoons salt in a 6-qt slow cooker.
Add the pork and brisket and stir to combine. Cover and cook on high 8 hours. Season with salt. Serve with cheese, sour cream and red onion.