Dr Pepper Adds New Flavor Regular, Diet Cherry Vanilla Soda Available In Texas, Neighboring States DALLAS -- Dr Pepper is adding a new cherry vanilla flavor, the second recent addition to the venerable Texas soda maker's lineup. Thanks for taking our survey.Taste Dr. Pepper's New Flavor?Will you taste Dr. Pepper's new cherry-vanilla flavor?Yes NoI don't know. The company said it will produce regular and diet versions of Cherry Vanilla Dr Pepper for Texas and nearby states, then take the diet version nationwide in January. Cadbury Schweppes Americas Beverages planned to enlist 270 carhops and Elvis Presley and Marilyn Monroe imitators...