Place 1½ 15.5 oz cans beans and 3 cups broth in blender and blend until smooth. Add to slow cooker.
Add 1½ 15.5 oz cans beans, 2½ cups broth, tomatoes, bell peppers, chilis, cumin, chili powder, garlic powder, onion powder, oregano, chicken, and 6 tbsp cilantro to slow cooker. Cover and cook for 4 hours on high or 6-8 hours on low.
To serve, remove chicken and shred with two forks. Return chicken to slow cooker and add green onions and 6 tbsp cilantro. Stir to combine. Top with limes and avocados.
