In a blender or food processor, combine 1½ cups of the Black Bean and Corn Salsa; the tomatoes; broth; cucumber; vinegar; and Worcestershire sauce. Cover and blend or process until smooth. Transfer to a large bowl. Cover and chill for 8 hours.
Top individual servings with the remaining ½ cup salsa. Pass cilantro.
To make ahead: Prepare as directed in step 1. Cover and chill for up to 24 hours. Continue as directed in step 2.