Line a slow cooker with a slow cooker bag (optional but highly recommended.)
Place the chicken breast on the bottom of the slow cooker.
Add black beans, corn, rotel, ranch and taco seasonings. Gently stir this on top of the chicken.
Pour on about a cup and a half (or a 14.5 oz can if you have cans).
Lay a block of cream cheese on top.
Cook on low for 6 to 8 hours.
Remove and shred chicken. Return chicken to crock pot and stir in along with the cream cheese.
Add additional (warmed) chicken broth if desired to thin to the consistency you like.
Serve with avocado, cheese, sour cream and cilantro for garnish.