Combine 1 cup broth, chili powder, cumin, and beans in a Dutch oven over medium-high heat. Combine remaining broth, poblano, and onion in a food processor; pulse until vegetables are chopped. Add onion mixture to pan.
Add tomatoes and cilantro to food processor, and process until coarsely chopped. Add tomato mixture to pan; bring to a boil. Cover, reduce heat, and simmer 5 minutes or until vegetables are tender. Remove from heat; stir in juice, olive oil, and salt. Garnish with cilantro sprigs, if desired.