If rumors are to be believed, then Starbucks is gearing up to launch two new signature drinks themed around the upcoming musical film, Wicked, starring Ariana Grande and Cynthia Erivo. Starbucks has long dominated the coffee shop industry thanks to the combination of yummy seasonal drinks and stylish merchandise that puts IKEA to shame. Most recently, the coffee shop chain released plans to launch an energy drink. Something Wicked this way comesNext month the world will finally be treated to the cinematic masterpiece of Wicked, maybe the most popular stage musical of all time. Ariana Grande is…